Pub Date : 2026-01-23DOI: 10.1016/j.cap.2026.01.019
Yuseong Yang, Min Soo Moon, Jin Young Park, Dongil Kim, Geonu Park, Ji Yoon Hwang, Junkyoung Kim, Gang Hee Han, Seung Ryong Park
Tellurium (Te) crystals possess a one-dimensional chain structure and have attracted considerable attention due to their intrinsic chirality. Recently, it has been reported that large-scale Te thin films can be grown on quasi-one-dimensional 1T′-MoTe2 substrates by chemical vapor deposition. In these samples, we observe that while most Te flakes grow along a common in-plane direction, a subset adopts a different orientation within the same 1T′-MoTe2 grain. Here, we perform a comparative study of these two types of Te flakes. The polarization-angle-dependent reflection measurements reveal a pronounced difference in optical anisotropy between the two orientations. To elucidate the origin of this behavior, we further conduct polarization-angle-dependent Raman spectroscopy. The results clearly show orientation-dependent changes in the symmetry of specific phonon modes, reflecting strong interactions between the Te chains and the underlying 1T′-MoTe2 substrate.
{"title":"Raman spectroscopic studies of strong interaction between CVD grown Te chain and 1T′-MoTe2 substrate","authors":"Yuseong Yang, Min Soo Moon, Jin Young Park, Dongil Kim, Geonu Park, Ji Yoon Hwang, Junkyoung Kim, Gang Hee Han, Seung Ryong Park","doi":"10.1016/j.cap.2026.01.019","DOIUrl":"10.1016/j.cap.2026.01.019","url":null,"abstract":"<div><div>Tellurium (Te) crystals possess a one-dimensional chain structure and have attracted considerable attention due to their intrinsic chirality. Recently, it has been reported that large-scale Te thin films can be grown on quasi-one-dimensional 1T′-MoTe<sub>2</sub> substrates by chemical vapor deposition. In these samples, we observe that while most Te flakes grow along a common in-plane direction, a subset adopts a different orientation within the same 1T′-MoTe<sub>2</sub> grain. Here, we perform a comparative study of these two types of Te flakes. The polarization-angle-dependent reflection measurements reveal a pronounced difference in optical anisotropy between the two orientations. To elucidate the origin of this behavior, we further conduct polarization-angle-dependent Raman spectroscopy. The results clearly show orientation-dependent changes in the symmetry of specific phonon modes, reflecting strong interactions between the Te chains and the underlying 1T′-MoTe<sub>2</sub> substrate.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 49-55"},"PeriodicalIF":3.1,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.cap.2026.01.013
Farah Fattouh, Samaya El Samad, Mohammed Khalaf, Salem Marhaba
This paper investigates the optical properties of platinum nanoparticles. The finite element method is used to calculate the optical response of nanoparticles, considering variations in their size, the surrounding medium, and the interparticle distance in dimer nanoparticles. As the size of nanoparticles increases, there is a notable shift in the spectral position of the localized surface plasmon resonance towards longer wavelengths. A noticeable improvement in the LSPR peak is also observed with an increase in the dielectric function of the medium. Moreover, reducing the distance between nanoparticles enhances the localized surface plasmon resonance, which is a result of plasmonic coupling occurring between the adjacent nanoparticles. The extinction, absorption, and scattering optical responses depend on the direction of polarized light. A noticeable increase in the magnitude of the localized surface plasmon resonance, shifting to the near infrared, has been observed in the longitudinal polarization compared to the transverse polarization. We highlight that while gold and silver are characterized by low-loss scattering, platinum's electronic structure facilitates a dominant absorption response and superior hot-carrier generation, bridging the gap between nanophotonics and high-performance catalysis.
{"title":"Plasmonic properties of spherical platinum nanoparticles","authors":"Farah Fattouh, Samaya El Samad, Mohammed Khalaf, Salem Marhaba","doi":"10.1016/j.cap.2026.01.013","DOIUrl":"10.1016/j.cap.2026.01.013","url":null,"abstract":"<div><div>This paper investigates the optical properties of platinum nanoparticles. The finite element method is used to calculate the optical response of nanoparticles, considering variations in their size, the surrounding medium, and the interparticle distance in dimer nanoparticles. As the size of nanoparticles increases, there is a notable shift in the spectral position of the localized surface plasmon resonance towards longer wavelengths. A noticeable improvement in the LSPR peak is also observed with an increase in the dielectric function of the medium. Moreover, reducing the distance between nanoparticles enhances the localized surface plasmon resonance, which is a result of plasmonic coupling occurring between the adjacent nanoparticles. The extinction, absorption, and scattering optical responses depend on the direction of polarized light. A noticeable increase in the magnitude of the localized surface plasmon resonance, shifting to the near infrared, has been observed in the longitudinal polarization compared to the transverse polarization. We highlight that while gold and silver are characterized by low-loss scattering, platinum's electronic structure facilitates a dominant absorption response and superior hot-carrier generation, bridging the gap between nanophotonics and high-performance catalysis.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 56-68"},"PeriodicalIF":3.1,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.cap.2026.01.014
Songyi Han , Jeong-Min Woo , Byungjun Oh , Woosub Byun , Min-Su Park , Dae-Myeong Geum
We analyzed the fabrication method and DC characteristics of an InGaAs/InAlAs enhancement-mode (E-mode) high-electron mobility transistor (HEMT) with hole delta(δ)-doping applied to the InAlAs buffer layer through simulation results. At a drain voltage (VD) = 0.5 V, the threshold voltage (VTH) was −0.65 V for the device without hole δ-doping in the buffer layer. However, the VTH increased to a maximum of 0.03 V at VD = 0.5 V by modifying the ratio of electron δ-doping and applying optimal hole δ-doping to the buffer layer. This was attributed to the hole δ-doping inducing energy band bending in the channel and minimizing impurity scattering. These results confirm that epitaxial engineering enables E-mode HEMT operation, contributing to reduced power consumption and optimizing circuit design for future applications.
{"title":"Implementation of enhancement-mode InGaAs/InAlAs HEMTs by hole delta-doping in a buffer-layer: A simulation study","authors":"Songyi Han , Jeong-Min Woo , Byungjun Oh , Woosub Byun , Min-Su Park , Dae-Myeong Geum","doi":"10.1016/j.cap.2026.01.014","DOIUrl":"10.1016/j.cap.2026.01.014","url":null,"abstract":"<div><div>We analyzed the fabrication method and DC characteristics of an InGaAs/InAlAs enhancement-mode (E-mode) high-electron mobility transistor (HEMT) with hole delta(δ)-doping applied to the InAlAs buffer layer through simulation results. At a drain voltage (<em>V</em><sub>D</sub>) = 0.5 V, the threshold voltage (<em>V</em><sub>TH</sub>) was −0.65 V for the device without hole δ-doping in the buffer layer. However, the <em>V</em><sub>TH</sub> increased to a maximum of 0.03 V at <em>V</em><sub>D</sub> = 0.5 V by modifying the ratio of electron δ-doping and applying optimal hole δ-doping to the buffer layer. This was attributed to the hole δ-doping inducing energy band bending in the channel and minimizing impurity scattering. These results confirm that epitaxial engineering enables E-mode HEMT operation, contributing to reduced power consumption and optimizing circuit design for future applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 69-74"},"PeriodicalIF":3.1,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of flexible, lead-free nanocomposites has attracted considerable attention for radiation-shielding applications. In this study, polyvinyl chloride (PVC) nanocomposites containing 50 wt% Bi2O3 nanostructures with distinct morphologies—spherical nanoparticles, nanowires, and nanoplates—were fabricated to investigate the morphology-dependent X-ray attenuation behavior. Attenuation measurements were carried out at 50, 110, and 150 kV using a standard setup. The results revealed a pronounced influence of particle morphology on both the mass attenuation coefficient (μ/ρ) and shielding efficiency. The composite incorporating spherical Bi2O3 nanoparticles exhibited the best overall performance, with a μ/ρ value of 2.39 cm2/g, an attenuation of 96.23 %, and a 0.25 mm Pb equivalence, achieved using 0.25 cm of the nanospherical composite layer at 150 kV. This superior performance, maintained across all tested energies, is attributed to enhanced packing density and reduced interparticle voids in the spherical structures. These findings demonstrate that PVC–Bi2O3 nanocomposites containing spherical nanoparticles offer strong potential as flexible, non-toxic, and efficient alternatives to conventional lead-based shielding materials.
柔性无铅纳米复合材料在辐射屏蔽方面的应用引起了人们的广泛关注。在这项研究中，聚氯乙烯（PVC）纳米复合材料含有50%的Bi2O3纳米结构，具有不同的形态——球形纳米颗粒、纳米线和纳米板——来研究形态依赖的x射线衰减行为。使用标准装置在50,110和150kv下进行衰减测量。结果表明，粒子形态对质量衰减系数（μ/ρ）和屏蔽效率均有显著影响。含球形Bi2O3纳米颗粒的复合材料表现出最佳的综合性能，μ/ρ值为2.39 cm2/g，衰减率为96.23%，在150 kV下，0.25 cm的纳米球形复合材料层达到0.25 mm Pb当量。这种优异的性能，在所有测试能量中都保持不变，归因于球形结构中填料密度的增强和颗粒间空隙的减少。这些发现表明，含有球形纳米颗粒的PVC-Bi2O3纳米复合材料具有强大的潜力，可以作为传统铅基屏蔽材料的柔性、无毒和高效替代品。
{"title":"Nanostructured bismuth oxide for enhanced diagnostic X-ray shielding: A comparative study","authors":"Mahdieh Ghasemi-Nejad , Leila Gholamzadeh , Ruhollah Adeli , Seyed Pezhman Shirmardi","doi":"10.1016/j.cap.2026.01.015","DOIUrl":"10.1016/j.cap.2026.01.015","url":null,"abstract":"<div><div>The development of flexible, lead-free nanocomposites has attracted considerable attention for radiation-shielding applications. In this study, polyvinyl chloride (PVC) nanocomposites containing 50 wt% Bi<sub>2</sub>O<sub>3</sub> nanostructures with distinct morphologies—spherical nanoparticles, nanowires, and nanoplates—were fabricated to investigate the morphology-dependent X-ray attenuation behavior. Attenuation measurements were carried out at 50, 110, and 150 kV using a standard setup. The results revealed a pronounced influence of particle morphology on both the mass attenuation coefficient (μ/ρ) and shielding efficiency. The composite incorporating spherical Bi<sub>2</sub>O<sub>3</sub> nanoparticles exhibited the best overall performance, with a μ/ρ value of 2.39 cm<sup>2</sup>/g, an attenuation of 96.23 %, and a 0.25 mm Pb equivalence, achieved using 0.25 cm of the nanospherical composite layer at 150 kV. This superior performance, maintained across all tested energies, is attributed to enhanced packing density and reduced interparticle voids in the spherical structures. These findings demonstrate that PVC–Bi<sub>2</sub>O<sub>3</sub> nanocomposites containing spherical nanoparticles offer strong potential as flexible, non-toxic, and efficient alternatives to conventional lead-based shielding materials.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 42-48"},"PeriodicalIF":3.1,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-21DOI: 10.1016/j.cap.2026.01.010
Jinmyeong Han, Jisang Hong
Manufacturing rare-earth free permanent magnets is an intriguing issue in modern advanced technology for several device applications. We investigate the temperature-dependent magnetic properties of all-3d Heusler alloy-based rare-earth free material Ni2CoFe and Ni1.75Mn0.25CoFe. Both systems have ferromagnetic ground states with Curie temperatures of about 975 K for Ni2CoFe and 1071 K for Ni1.75Mn0.25CoFe. We obtain the uniaxial anisotropy constants of 0.57 MJ/m3 and 0.77 MJ/m3 for Ni2CoFe and Ni1.75Mn0.25CoFe. The Ni2CoFe has coercivity of 0.997 T, whereas the Ni1.75Mn0.25CoFe shows 1.928 T at zero Kelvin. At room temperature, the coercivity field is decreased to 0.843 T (Ni2CoFe) and 1.305 T (Ni1.75Mn0.25CoFe). Both structures exhibit semi-hard magnetic properties at room temperature. We obtained the maximum energy product of 311 kJ/m3 in Ni2CoFe and 341 kJ/m3 in Ni1.75Mn0.25CoFe at room temperature. When increasing the temperature up to 600 K, the Ni1.75Mn0.25CoFe shows higher maximum energy product (271 kJ/m3) than the Ni2CoFe (197 kJ/m3). Furthermore, the Ni1.75Mn0.25CoFe are less sensitive to the demagnetization factor than Ni2CoFe. Our results may indicate that the Heusler type Ni1.75Mn0.25CoFe have the potential for rare-earth free gap magnet.
制造无稀土永磁体是现代先进技术中几个器件应用中一个有趣的问题。研究了全三维Heusler合金基无稀土材料Ni2CoFe和Ni1.75Mn0.25CoFe的温度相关磁性能。两种体系都具有铁磁基态，Ni2CoFe的居里温度约为975 K， Ni1.75Mn0.25CoFe的居里温度约为1071 K。我们得到Ni2CoFe和Ni1.75Mn0.25CoFe的单轴各向异性常数分别为0.57 MJ/m3和0.77 MJ/m3。Ni2CoFe的矫顽力为0.997 T，而Ni1.75Mn0.25CoFe的矫顽力为1.928 T。室温下，矫顽力场分别降至0.843 T （Ni2CoFe）和1.305 T （Ni1.75Mn0.25CoFe）。两种结构在室温下均表现出半硬磁性。在室温下，Ni2CoFe和Ni1.75Mn0.25CoFe的最大能积分别为311 kJ/m3和341 kJ/m3。当温度升高到600 K时，Ni1.75Mn0.25CoFe的最大能积为271 kJ/m3，高于Ni2CoFe的197 kJ/m3。此外，Ni1.75Mn0.25CoFe对退磁因子的敏感性低于Ni2CoFe。结果表明，Heusler型Ni1.75Mn0.25CoFe具有成为稀土无隙磁体的潜力。
{"title":"Potential gap permanent magnet of Heusler type Ni2-xMnxCoFe (x = 0, 0.25)","authors":"Jinmyeong Han, Jisang Hong","doi":"10.1016/j.cap.2026.01.010","DOIUrl":"10.1016/j.cap.2026.01.010","url":null,"abstract":"<div><div>Manufacturing rare-earth free permanent magnets is an intriguing issue in modern advanced technology for several device applications. We investigate the temperature-dependent magnetic properties of all-3d Heusler alloy-based rare-earth free material Ni<sub>2</sub>CoFe and Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe. Both systems have ferromagnetic ground states with Curie temperatures of about 975 K for Ni<sub>2</sub>CoFe and 1071 K for Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe. We obtain the uniaxial anisotropy constants of 0.57 MJ/m<sup>3</sup> and 0.77 MJ/m<sup>3</sup> for Ni<sub>2</sub>CoFe and Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe. The Ni<sub>2</sub>CoFe has coercivity of 0.997 T, whereas the Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe shows 1.928 T at zero Kelvin. At room temperature, the coercivity field is decreased to 0.843 T (Ni<sub>2</sub>CoFe) and 1.305 T (Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe). Both structures exhibit semi-hard magnetic properties at room temperature. We obtained the maximum energy product of 311 kJ/m<sup>3</sup> in Ni<sub>2</sub>CoFe and 341 kJ/m<sup>3</sup> in Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe at room temperature. When increasing the temperature up to 600 K, the Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe shows higher maximum energy product (271 kJ/m<sup>3</sup>) than the Ni<sub>2</sub>CoFe (197 kJ/m<sup>3</sup>). Furthermore, the Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe are less sensitive to the demagnetization factor than Ni<sub>2</sub>CoFe. Our results may indicate that the Heusler type Ni<sub>1.75</sub>Mn<sub>0.25</sub>CoFe have the potential for rare-earth free gap magnet.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 24-30"},"PeriodicalIF":3.1,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-20DOI: 10.1016/j.cap.2026.01.007
Xiao Zhang, Liang Guo, Tao Peng, Bingcheng Luo
Aluminum scandium nitride (AlScN) thin films have emerged as promising materials for developing energy-efficient devices, uniquely combining wide-bandgap semiconducting and ferroelectric properties. Here, we report a self-powered and switchable photoresponse in ferroelectric AlScN/Si heterostructures, driven by the synergy between the depolarization field and the built-in electric field. Crucially, the upward polarization state yields a persistent photoresponse, enabling the emulation of critical biological functions, such as short-term and long-term synaptic plasticity. This work demonstrates an alternative route for engineering neuromorphic photoresponse via ferroelectric polarization, potentially enabling applications in energy-efficient intelligent optoelectronic systems.
{"title":"Self-powered neuromorphic photoresponses of ferroelectric AlScN/Si heterostructures","authors":"Xiao Zhang, Liang Guo, Tao Peng, Bingcheng Luo","doi":"10.1016/j.cap.2026.01.007","DOIUrl":"10.1016/j.cap.2026.01.007","url":null,"abstract":"<div><div>Aluminum scandium nitride (AlScN) thin films have emerged as promising materials for developing energy-efficient devices, uniquely combining wide-bandgap semiconducting and ferroelectric properties. Here, we report a self-powered and switchable photoresponse in ferroelectric AlScN/Si heterostructures, driven by the synergy between the depolarization field and the built-in electric field. Crucially, the upward polarization state yields a persistent photoresponse, enabling the emulation of critical biological functions, such as short-term and long-term synaptic plasticity. This work demonstrates an alternative route for engineering neuromorphic photoresponse via ferroelectric polarization, potentially enabling applications in energy-efficient intelligent optoelectronic systems.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 8-12"},"PeriodicalIF":3.1,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-19DOI: 10.1016/j.cap.2026.01.009
Md Minhaj Ali , Nitish Ghosh , P. Dey
We have investigated bias-dependent spintronic and optospintronic properties in a Si(100)/La0.7Sr0.3MnO3(LSMO)/CuPc/Au heterostructure under 600 nm red light(L), magnetic fields(H), and temperatures from 300 to 50 K. The specific aim was to understand the role of external perturbation in influencing charge and spin conduction at the inorganic-organic interface. Intriguingly, an asymmetric I-V with a rectification ratio of 6100 % at 300 K, which reduces to 63 % at 50 K, is observed. Spin-dependent conduction of “spin-polarised electrons” across the magnetic LSMO/CuPc interface dominates the positive bias resistance temperature(R-T) curve. A bias-dependent conduction mechanism, as well as bias-dependent magnetoresistance (MR) of −80 % and −20 % at 300 K, were observed under positive and negative bias, respectively. MR readings dropped significantly with 5.43 mW/cm2 light under both positive and negative biases. These findings reveal the potential of hybrid LSMO/CuPc heterostructures for bias-tunable spintronic and optospintronic applications.
{"title":"Temperature dependent magneto-optical response in hybrid inorganic-organic p-Si (100)/La0.7Sr0.3MnO3/ CuPc/Au heterostructure: An interface driven phenomenon","authors":"Md Minhaj Ali , Nitish Ghosh , P. Dey","doi":"10.1016/j.cap.2026.01.009","DOIUrl":"10.1016/j.cap.2026.01.009","url":null,"abstract":"<div><div>We have investigated bias-dependent spintronic and optospintronic properties in a Si(100)/La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>(LSMO)/CuPc/Au heterostructure under 600 nm red light(L), magnetic fields(H), and temperatures from 300 to 50 K. The specific aim was to understand the role of external perturbation in influencing charge and spin conduction at the inorganic-organic interface. Intriguingly, an asymmetric I-<em>V</em> with a rectification ratio of 6100 % at 300 K, which reduces to 63 % at 50 K, is observed. Spin-dependent conduction of “spin-polarised electrons” across the magnetic LSMO/CuPc interface dominates the positive bias resistance temperature(R-T) curve. A bias-dependent conduction mechanism, as well as bias-dependent magnetoresistance (MR) of −80 % and −20 % at 300 K, were observed under positive and negative bias, respectively. MR readings dropped significantly with 5.43 mW/cm<sup>2</sup> light under both positive and negative biases. These findings reveal the potential of hybrid LSMO/CuPc heterostructures for bias-tunable spintronic and optospintronic applications.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 31-41"},"PeriodicalIF":3.1,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-19DOI: 10.1016/j.cap.2026.01.011
Seungho Yu , Ki Chul Kim
Owing to the high global warming potential of sulfur hexafluoride (SF6), its selective capture from air is critical to mitigating its environmental impact. In this study, a high-throughput screening of the 2019 computation-ready metal–organic framework (MOF) database, known as the CoRE MOF database, which comprises over 14,000 MOFs, is conducted to identify promising candidates for the selective capture of SF6. A cascade-type screening approach narrows the dataset to 542 MOFs and categorized them into subsets with and without open metal sites, namely, OMS-RD and NOMS-RD, respectively. Comprehensive analyses using Henry's constant and Grand Canonical Monte Carlo simulations reveal the optimal structural and chemical features of MOFs with high-performance parameters, such as pore size, void fraction, and surface area. The functionalization of top-performing MOFs achieves considerable performance enhancements, particularly among the NOMS-RD candidates, with fluorine and thiol groups playing a core role in the selectivity improvement. This study provides a systematic approach for the rational design and subsequent synthesis of MOFs with efficient greenhouse gas capture ability.
{"title":"High-throughput screening of metal‒organic frameworks for the selective capture of sulfur hexafluoride from air","authors":"Seungho Yu , Ki Chul Kim","doi":"10.1016/j.cap.2026.01.011","DOIUrl":"10.1016/j.cap.2026.01.011","url":null,"abstract":"<div><div>Owing to the high global warming potential of sulfur hexafluoride (SF<sub>6</sub>), its selective capture from air is critical to mitigating its environmental impact. In this study, a high-throughput screening of the 2019 computation-ready metal–organic framework (MOF) database, known as the CoRE MOF database, which comprises over 14,000 MOFs, is conducted to identify promising candidates for the selective capture of SF<sub>6</sub>. A cascade-type screening approach narrows the dataset to 542 MOFs and categorized them into subsets with and without open metal sites, namely, OMS-RD and NOMS-RD, respectively. Comprehensive analyses using Henry's constant and Grand Canonical Monte Carlo simulations reveal the optimal structural and chemical features of MOFs with high-performance parameters, such as pore size, void fraction, and surface area. The functionalization of top-performing MOFs achieves considerable performance enhancements, particularly among the NOMS-RD candidates, with fluorine and thiol groups playing a core role in the selectivity improvement. This study provides a systematic approach for the rational design and subsequent synthesis of MOFs with efficient greenhouse gas capture ability.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 13-23"},"PeriodicalIF":3.1,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-16DOI: 10.1016/j.cap.2026.01.008
Tae Hoon Kim, Cheol Jun Kim, Min Kyung Ku, Taehee Noh, Minu Kang, Hyeon Su Seong, Seung Jin Kang, Bo Soo Kang
Ferroelectrics have attracted academic and industrial interest owing to their functional properties. However, their reliability is often degraded by fatigue under repeated electrical cycling. In this study, we investigate the evolution of defect-related internal resistance and interfacial capacitance in PbZr0.52Ti0.48O3 (PZT) thin-film capacitors by combining first-order reversal curve (FORC) analysis with a switching-current circuit model. The proposed framework provides distributions of internal resistance and interfacial capacitance and tracks their evolution during electrical cycling. The FORC results reveal a gradual reduction in the overall switching density accompanied by a narrowing of the coercive-voltage distribution and a shift of the internal-bias distribution toward zero, indicating a selective suppression of switching events under extreme local conditions. In addition, the average internal resistance exhibits a clear correlation with leakage current, while the interfacial capacitance decreases monotonically with cycling, which is interpreted as an increase in the effective oxide thickness. This purely electrical analysis provides quantitative insight into fatigue-induced inhomogeneous degradation in PZT thin-film capacitors and can be extended to other ferroelectric material systems.
{"title":"Electrical cycling induced evolution of internal resistance and interfacial capacitance distributions in PZT thin-film capacitors","authors":"Tae Hoon Kim, Cheol Jun Kim, Min Kyung Ku, Taehee Noh, Minu Kang, Hyeon Su Seong, Seung Jin Kang, Bo Soo Kang","doi":"10.1016/j.cap.2026.01.008","DOIUrl":"10.1016/j.cap.2026.01.008","url":null,"abstract":"<div><div>Ferroelectrics have attracted academic and industrial interest owing to their functional properties. However, their reliability is often degraded by fatigue under repeated electrical cycling. In this study, we investigate the evolution of defect-related internal resistance and interfacial capacitance in PbZr<sub>0.52</sub>Ti<sub>0.48</sub>O<sub>3</sub> (PZT) thin-film capacitors by combining first-order reversal curve (FORC) analysis with a switching-current circuit model. The proposed framework provides distributions of internal resistance and interfacial capacitance and tracks their evolution during electrical cycling. The FORC results reveal a gradual reduction in the overall switching density accompanied by a narrowing of the coercive-voltage distribution and a shift of the internal-bias distribution toward zero, indicating a selective suppression of switching events under extreme local conditions. In addition, the average internal resistance exhibits a clear correlation with leakage current, while the interfacial capacitance decreases monotonically with cycling, which is interpreted as an increase in the effective oxide thickness. This purely electrical analysis provides quantitative insight into fatigue-induced inhomogeneous degradation in PZT thin-film capacitors and can be extended to other ferroelectric material systems.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"85 ","pages":"Pages 1-7"},"PeriodicalIF":3.1,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cerium oxide nanoparticles (CeO2 NPs) were synthesized via chemical and green routes assisted by the hydrothermal technique using NaOH and Achyranthes aspera (A. aspera) leaf extract as reducing cum stabilizing agents. Structural, morphological, and optical properties of the nanoparticles were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, and UV–visible spectroscopy. The crystallite size estimated by the Debye-Scherrer formula was found to be 12.83 nm and 5.75 nm for chemical and green synthesized CeO2 NPs, respectively. The photocatalytic activity of CeO2 NPs was examined through the photocatalytic degradation of MB dye under natural sunlight. After 60 min of sunlight exposure, the degradation efficiency of MB was limited to 11.53 % for chemically synthesized CeO2 nanoparticles; however, green-synthesized CeO2 nanoparticles exhibited a pronounced enhancement, achieving 78.41 % degradation. Overall, this study demonstrates the advantages of plant-mediated synthesis over the conventional chemical method and suggests that CeO2 NPs hold significant promise for sustainable applications, particularly in water treatment.
{"title":"From synthesis to photocatalytic activity: A comparative assessment of chemically and green synthesized CeO2 nanoparticles","authors":"Pervinder Kaur , Anu Kapoor , Anand Kumar , Suresh Kumar","doi":"10.1016/j.cap.2026.01.006","DOIUrl":"10.1016/j.cap.2026.01.006","url":null,"abstract":"<div><div>Cerium oxide nanoparticles (CeO<sub>2</sub> NPs) were synthesized via chemical and green routes assisted by the hydrothermal technique using NaOH and <em>Achyranthes aspera</em> (<em>A. aspera</em>) leaf extract as reducing cum stabilizing agents. Structural, morphological, and optical properties of the nanoparticles were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, and UV–visible spectroscopy. The crystallite size estimated by the Debye-Scherrer formula was found to be 12.83 nm and 5.75 nm for chemical and green synthesized CeO<sub>2</sub> NPs, respectively. The photocatalytic activity of CeO<sub>2</sub> NPs was examined through the photocatalytic degradation of MB dye under natural sunlight. After 60 min of sunlight exposure, the degradation efficiency of MB was limited to 11.53 % for chemically synthesized CeO<sub>2</sub> nanoparticles; however, green-synthesized CeO<sub>2</sub> nanoparticles exhibited a pronounced enhancement, achieving 78.41 % degradation. Overall, this study demonstrates the advantages of plant-mediated synthesis over the conventional chemical method and suggests that CeO<sub>2</sub> NPs hold significant promise for sustainable applications, particularly in water treatment.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"84 ","pages":"Pages 130-135"},"PeriodicalIF":3.1,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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