Poornima Karil, Nikita Karma, H. S. Dager, N. Kaurav
The structural properties strontium oxide (SrO) in two phases, namely, Rocksalt (B1) and Cesium Chloride (B2) phases, and a structural transition from B1 to B2 structures are presented. We have estimated the effect of pressure on structural and elastic properties of SrO semiconducting material using an effective inter-ionic potential method, which contain the long-range Coulomb and van der Waals (vdW) interactions and the short-range repulsive interaction of up to second- neighbor ions within the Hafemeister and Flygare approach. To calculate the vdW coefficients Slater-Kirkwood variational method was used. Our calculated phase transition pressure (Pt) is 38.5 GPa. We have also focused on the elastic properties of SrO compound within the effective inter-ionic potential approach and the second order elastic constants (SOEC) were predicted in both the phases. The present calculations have provided a good agreement with the available data reported on this compound.
{"title":"Effect of pressure on structural and elastic properties of strontium oxide","authors":"Poornima Karil, Nikita Karma, H. S. Dager, N. Kaurav","doi":"10.1063/5.0061443","DOIUrl":"https://doi.org/10.1063/5.0061443","url":null,"abstract":"The structural properties strontium oxide (SrO) in two phases, namely, Rocksalt (B1) and Cesium Chloride (B2) phases, and a structural transition from B1 to B2 structures are presented. We have estimated the effect of pressure on structural and elastic properties of SrO semiconducting material using an effective inter-ionic potential method, which contain the long-range Coulomb and van der Waals (vdW) interactions and the short-range repulsive interaction of up to second- neighbor ions within the Hafemeister and Flygare approach. To calculate the vdW coefficients Slater-Kirkwood variational method was used. Our calculated phase transition pressure (Pt) is 38.5 GPa. We have also focused on the elastic properties of SrO compound within the effective inter-ionic potential approach and the second order elastic constants (SOEC) were predicted in both the phases. The present calculations have provided a good agreement with the available data reported on this compound.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77632677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Digital filtering is an essential part of electronic speckle pattern interferometer which is been used widely to study surface deformations. Raw speckle patterns needs digital filtering before it is used for further analysis. Many times multiple use of digital filtering leads to change in the quantitative information of surface under study. This paper reports effect of multiple usages of various digital filters on the calculated surface deformation values. Multiple usages of various digital filtering leads to loss in speckleness of the pattern indicating decrease in speckle noise and marginal and in some cases significant change in surface displacement values.
{"title":"Effect of digital filtering on the analysis of surface deformations using electronic speckle pattern interferometer","authors":"P. P. Padghan, N. B. Bhagat, K. Alti","doi":"10.1063/5.0060869","DOIUrl":"https://doi.org/10.1063/5.0060869","url":null,"abstract":"Digital filtering is an essential part of electronic speckle pattern interferometer which is been used widely to study surface deformations. Raw speckle patterns needs digital filtering before it is used for further analysis. Many times multiple use of digital filtering leads to change in the quantitative information of surface under study. This paper reports effect of multiple usages of various digital filters on the calculated surface deformation values. Multiple usages of various digital filtering leads to loss in speckleness of the pattern indicating decrease in speckle noise and marginal and in some cases significant change in surface displacement values.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74165370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sandip K. Fasate, R. Parlikar, S. Bajaj, S. Rode, A. V. Raut, S. Alone
The family of barium hexaferrite BaFe12O19 stand out for the magnetic catalytic applications as it has a absorbance magnitude to a whole range in the visible light; chemical stability, magnetic properties and magnetodielectric characteristics as well. In this work, we have prepared BaFe12O19 hexaferrite, doped with a divalent Mn2+ ion via sol-gel auto- combustion method using C6H8O7 as a fuel. The synthesized Ba0.9Mn0.1Fe12O19 hexaferrite nanoparticles were characterized by XRD, Infra-Red spectroscopy (IR) approach for the structural investigation and phase purity. The XRD pattern scrutiny confirms the formation of a single-phase M-type hexagonal crystal structure of Ba0.9Mn0.1Fe12O19. The lattice constant (a), lattice constant (c), and unit cell volume (V) was resolved using unique XRD data. The crystallite size was obtained through Debye-Scherrer's formula indicates the nanocrystalline nature of the Ba0.9Mn0.1Fe12O19 hexaferrite. IR spectra shows the formation of two main absorption bands near 574.79 cm-1; 574.07 cm−1 and 425.86 cm−1 which are characterized to the formation of Ba0.9Mn0.1Fe12O19 nanoparticles. DC-electrical resistivity was in well correlation with the reported literature to explain the electrical properties of Mn2+ loaded barium hexaferrite NPs.
{"title":"Synthesis, structural and electrical investigations of Ba0.9Mn0.1Fe12O19 hexaferrite NPs","authors":"Sandip K. Fasate, R. Parlikar, S. Bajaj, S. Rode, A. V. Raut, S. Alone","doi":"10.1063/5.0061028","DOIUrl":"https://doi.org/10.1063/5.0061028","url":null,"abstract":"The family of barium hexaferrite BaFe12O19 stand out for the magnetic catalytic applications as it has a absorbance magnitude to a whole range in the visible light; chemical stability, magnetic properties and magnetodielectric characteristics as well. In this work, we have prepared BaFe12O19 hexaferrite, doped with a divalent Mn2+ ion via sol-gel auto- combustion method using C6H8O7 as a fuel. The synthesized Ba0.9Mn0.1Fe12O19 hexaferrite nanoparticles were characterized by XRD, Infra-Red spectroscopy (IR) approach for the structural investigation and phase purity. The XRD pattern scrutiny confirms the formation of a single-phase M-type hexagonal crystal structure of Ba0.9Mn0.1Fe12O19. The lattice constant (a), lattice constant (c), and unit cell volume (V) was resolved using unique XRD data. The crystallite size was obtained through Debye-Scherrer's formula indicates the nanocrystalline nature of the Ba0.9Mn0.1Fe12O19 hexaferrite. IR spectra shows the formation of two main absorption bands near 574.79 cm-1; 574.07 cm−1 and 425.86 cm−1 which are characterized to the formation of Ba0.9Mn0.1Fe12O19 nanoparticles. DC-electrical resistivity was in well correlation with the reported literature to explain the electrical properties of Mn2+ loaded barium hexaferrite NPs.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89624562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent discovery of intrinsic ferromagnetism in Fe3GeTe2 monolayer not only extended the family of 2D magnetic materials, but also stimulated further interest in the possibility to tune their magnetic properties without changing the structural properties or introducing defects. We have studied the role of van-der-Waals (vdW) interaction in such layered materials. It is seen that the incorporation of vdW interaction within density functional theory approach gives more accurate electronic and magnetic properties in 2D vdW ferromagnet. In search of new vdW ferromagnet, we have studied Co3GeTe2 and hybrid layered structure of Fe3GeTe2/Co3GeTe2. Significant changes in magnetic and electronic properties are observed on Co insertion in Fe3GeTe2. Spin polarization of 53% is calculated for Fe3GeTe2, while for Co3GeTe2 and hybrid structure negative spin polarization is obtained. We have observed the reversal of spin polarization due to Co and the amplitude of spin polarization also depends on Co concentration in the layered Fe3GeTe2. Therefore, the intrinsic magnetic properties of 2D vdW ferromagnet can be tuned by making hybrid structure which is very useful in designing new 2D intrinsic magnetic material.
{"title":"Tuning of electronic and magnetic properties in 2D van der Waals hybrid ferromagnet (Fe3GeTe2/Co3GeTe2)","authors":"K. M. Athira, B. R. Bhagat, A. Dashora","doi":"10.1063/5.0060879","DOIUrl":"https://doi.org/10.1063/5.0060879","url":null,"abstract":"Recent discovery of intrinsic ferromagnetism in Fe3GeTe2 monolayer not only extended the family of 2D magnetic materials, but also stimulated further interest in the possibility to tune their magnetic properties without changing the structural properties or introducing defects. We have studied the role of van-der-Waals (vdW) interaction in such layered materials. It is seen that the incorporation of vdW interaction within density functional theory approach gives more accurate electronic and magnetic properties in 2D vdW ferromagnet. In search of new vdW ferromagnet, we have studied Co3GeTe2 and hybrid layered structure of Fe3GeTe2/Co3GeTe2. Significant changes in magnetic and electronic properties are observed on Co insertion in Fe3GeTe2. Spin polarization of 53% is calculated for Fe3GeTe2, while for Co3GeTe2 and hybrid structure negative spin polarization is obtained. We have observed the reversal of spin polarization due to Co and the amplitude of spin polarization also depends on Co concentration in the layered Fe3GeTe2. Therefore, the intrinsic magnetic properties of 2D vdW ferromagnet can be tuned by making hybrid structure which is very useful in designing new 2D intrinsic magnetic material.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76990908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Silver nanoparticles have attracted the attention due to their chemical stability, catalytic activity, localized surface plasma resonance, and high conductivity. Silver thin films with a thickness of ∼21 nm were deposited on corning glass substrate using radio frequency magnetron sputtering system. The deposited silver films were subsequently annealed to grow silver nanoparticles in the temperature range of 200℃ to 500℃ with the difference of 100℃ under a vacuum (Pressure ∼10−6 mbar) for fixed duration of 60 minutes. Composition and surface morphology of silver nanoparticles on the glass substrate were determined using field emission scanning electron microscope (FESEM) and atomic force microscopy (AFM) and energy dispersive spectroscopy (EDS). The results obtained from this study showed that by annealing at higher temperature, the flat silver thin films changed into rough silver thin films and further increment in temperature changed the silver thin films into silver nanoparticles. To study optical properties of Ag nanoparticles, the absorbance and diffuse reflectance spectra were also measured using UV–Vis–NIR spectroscopy.
{"title":"Effect of the annealing temperature on the growth of the silver nanoparticles synthesized by physical route","authors":"Manvendra Singh Gangwar, P. Agarwal","doi":"10.1063/5.0061110","DOIUrl":"https://doi.org/10.1063/5.0061110","url":null,"abstract":"Silver nanoparticles have attracted the attention due to their chemical stability, catalytic activity, localized surface plasma resonance, and high conductivity. Silver thin films with a thickness of ∼21 nm were deposited on corning glass substrate using radio frequency magnetron sputtering system. The deposited silver films were subsequently annealed to grow silver nanoparticles in the temperature range of 200℃ to 500℃ with the difference of 100℃ under a vacuum (Pressure ∼10−6 mbar) for fixed duration of 60 minutes. Composition and surface morphology of silver nanoparticles on the glass substrate were determined using field emission scanning electron microscope (FESEM) and atomic force microscopy (AFM) and energy dispersive spectroscopy (EDS). The results obtained from this study showed that by annealing at higher temperature, the flat silver thin films changed into rough silver thin films and further increment in temperature changed the silver thin films into silver nanoparticles. To study optical properties of Ag nanoparticles, the absorbance and diffuse reflectance spectra were also measured using UV–Vis–NIR spectroscopy.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77084850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Bajaj, A. V. Raut, M. V. Khedkar, M. K. Babrekar, S. Shinde, K. M. Jadhav
In this investigation, CoFe2O4 ferrite nanoparticles (CFN) were successfully synthesized by a simple and cost-effective sol-gel auto-combustion method using citric acid (C6H8O7) as a fuel. The sol-gel synthesized CFN samples were characterized for microstructural and physic-chemical properties through X-ray diffraction (XRD) and infrared analysis. The crystallite size (t), the lattice constant (a) a = b = c, and X-ray density dX of CFN were calculated using X-ray diffraction data. Crystallite size was obtained through Debye-Scherrer’s formula indicates the nanocrystalline nature of the prepared sample. The functional group analysis of CFN was carried out by infrared spectroscopy which confirmed the presence of M-O stretching vibrations in the investigated samples. The IR analysis confirmed the formation of the ferrite phase in the CFN samples.
本研究以柠檬酸(C6H8O7)为燃料，采用溶胶-凝胶自燃烧方法，成功合成了CoFe2O4铁氧体纳米颗粒(CFN)。通过x射线衍射(XRD)和红外分析对溶胶-凝胶合成的CFN样品进行了微观结构和理化性质表征。利用x射线衍射数据计算了CFN的晶体尺寸(t)、晶格常数(a) a = b = c和x射线密度dX。通过Debye-Scherrer公式得到的晶粒尺寸表明所制备样品的纳米晶性质。利用红外光谱对CFN进行了官能团分析，证实了所研究样品中存在M-O拉伸振动。红外光谱分析证实了CFN样品中铁氧体相的形成。
{"title":"Facile synthesis, structure and infrared properties of CoFe2O4 ferrite nanoparticles (CFN)","authors":"S. Bajaj, A. V. Raut, M. V. Khedkar, M. K. Babrekar, S. Shinde, K. M. Jadhav","doi":"10.1063/5.0061026","DOIUrl":"https://doi.org/10.1063/5.0061026","url":null,"abstract":"In this investigation, CoFe2O4 ferrite nanoparticles (CFN) were successfully synthesized by a simple and cost-effective sol-gel auto-combustion method using citric acid (C6H8O7) as a fuel. The sol-gel synthesized CFN samples were characterized for microstructural and physic-chemical properties through X-ray diffraction (XRD) and infrared analysis. The crystallite size (t), the lattice constant (a) a = b = c, and X-ray density dX of CFN were calculated using X-ray diffraction data. Crystallite size was obtained through Debye-Scherrer’s formula indicates the nanocrystalline nature of the prepared sample. The functional group analysis of CFN was carried out by infrared spectroscopy which confirmed the presence of M-O stretching vibrations in the investigated samples. The IR analysis confirmed the formation of the ferrite phase in the CFN samples.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74382935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Our density functional method calculations reveal the molecular interaction of biomolecule deoxyribonucleic acid (DNA) nucleobase Thymine (T) on Zirconium (Zr) doped graphene to investigate the biomedical applications including dental implants, knee and chronic kidney disease. The complex system depends on molecular structural and electronic properties of the doped Zirconium atom. The different parameters were evaluated including adsorption energies, HOMO, LUMO, dipole moment and density of states (DOS). The complex system studied suggest promising template for DNA related research; particularly in biomedical field.
{"title":"DFT study of thymine adsorption on Zr doped graphene","authors":"Jawaher Qasem, B. Lone","doi":"10.1063/5.0061394","DOIUrl":"https://doi.org/10.1063/5.0061394","url":null,"abstract":"Our density functional method calculations reveal the molecular interaction of biomolecule deoxyribonucleic acid (DNA) nucleobase Thymine (T) on Zirconium (Zr) doped graphene to investigate the biomedical applications including dental implants, knee and chronic kidney disease. The complex system depends on molecular structural and electronic properties of the doped Zirconium atom. The different parameters were evaluated including adsorption energies, HOMO, LUMO, dipole moment and density of states (DOS). The complex system studied suggest promising template for DNA related research; particularly in biomedical field.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84334072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heavy metals pollution is a severe threat to the environment and public health. Some heavy metals such as cobalt, zinc, iron and copper are required by living organisms in minute quantities, but their presence in higher concentrations leads to toxic effects. Heavy metals such as cadmium, lead, arsenic, chromium and mercury are fatal even at trace concentrations. Therefore, the development of a sensitive platform for the detection of heavy metals in various point sources is of the utmost importance. Plant biomass derived nanomaterials have provided unique opportunity to invent eco-friendly, sustainable and highly sensitive and selective methods for the sensing of heavy metals. Here we have briefly described several plant biomass derived nanomaterials which have been successfully explored for the optical sensing abilities in the detection of toxic heavy metal ions.
{"title":"Optical sensing of heavy metals using biomass derived nanomaterials: A mini review","authors":"T. Adinarayana, D. K. Reddy","doi":"10.1063/5.0061005","DOIUrl":"https://doi.org/10.1063/5.0061005","url":null,"abstract":"Heavy metals pollution is a severe threat to the environment and public health. Some heavy metals such as cobalt, zinc, iron and copper are required by living organisms in minute quantities, but their presence in higher concentrations leads to toxic effects. Heavy metals such as cadmium, lead, arsenic, chromium and mercury are fatal even at trace concentrations. Therefore, the development of a sensitive platform for the detection of heavy metals in various point sources is of the utmost importance. Plant biomass derived nanomaterials have provided unique opportunity to invent eco-friendly, sustainable and highly sensitive and selective methods for the sensing of heavy metals. Here we have briefly described several plant biomass derived nanomaterials which have been successfully explored for the optical sensing abilities in the detection of toxic heavy metal ions.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80341259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study deals with the synthesis and characterization of Pure PMMA polymer film and ZnO incorporated PMMA composite film using X-ray diffraction technique.The pure PMMA and ZnO incorporated PMMA composite were prepared by solution casting method. The crystalline properties such as crystallite size, interplanar distance and crystallinity index has been calculated and studied as a function of ZnO. The study reveals that, as we increase the concentration of ZnO in to the PMMA film, the crystalline properties are enhancing. The crystallinity index for pure PMMA, .05% and .1% ZnO doped PMMA are found to be 15.73% , 22.2% and 24.17% respectively.
{"title":"Crystalline properties of ZnO doped poly (methyl methacrylate) PMMA thin films","authors":"N. Pandey, A. K. Patel, A. Dwivedi","doi":"10.1063/5.0061155","DOIUrl":"https://doi.org/10.1063/5.0061155","url":null,"abstract":"The present study deals with the synthesis and characterization of Pure PMMA polymer film and ZnO incorporated PMMA composite film using X-ray diffraction technique.The pure PMMA and ZnO incorporated PMMA composite were prepared by solution casting method. The crystalline properties such as crystallite size, interplanar distance and crystallinity index has been calculated and studied as a function of ZnO. The study reveals that, as we increase the concentration of ZnO in to the PMMA film, the crystalline properties are enhancing. The crystallinity index for pure PMMA, .05% and .1% ZnO doped PMMA are found to be 15.73% , 22.2% and 24.17% respectively.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"54 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89683489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Understanding the exciton many-body interactions and their recombination dynamics in transition metal dichalcogenides (TMDCs) are important for potential applications in optoelectronics and valleytronics. Herein, using ultrafast non-degenerate transient differential reflectance spectroscopy, we studied exciton interactions in WS2 single crystal. Spectrally and temporally resolved studies revealed the strong interrelated excitonic interactions of A, B and C excitons and associated transient stark blueshift and broadening of exciton resonances. Additionally, we observed an unusual prolonged decay of direct band-gap exciton (A exciton) with fluence, which interprets the presence of trap state in the system. Our findings provide a comprehensive understanding of material’s intrinsic properties and exciton many-body physics which offers efficient pathways to optoelectronic applications based on TMDCs.
{"title":"Unveiling exciton many-body interactions in WS2 single crystal","authors":"Pravrati Taank, K. Adarsh","doi":"10.1063/5.0060842","DOIUrl":"https://doi.org/10.1063/5.0060842","url":null,"abstract":"Understanding the exciton many-body interactions and their recombination dynamics in transition metal dichalcogenides (TMDCs) are important for potential applications in optoelectronics and valleytronics. Herein, using ultrafast non-degenerate transient differential reflectance spectroscopy, we studied exciton interactions in WS2 single crystal. Spectrally and temporally resolved studies revealed the strong interrelated excitonic interactions of A, B and C excitons and associated transient stark blueshift and broadening of exciton resonances. Additionally, we observed an unusual prolonged decay of direct band-gap exciton (A exciton) with fluence, which interprets the presence of trap state in the system. Our findings provide a comprehensive understanding of material’s intrinsic properties and exciton many-body physics which offers efficient pathways to optoelectronic applications based on TMDCs.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81764211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：