{"title":"On Interpretation of Acoustic Measurement in the Dilute Non-Kramers System Y1−xPrxIr2Zn20","authors":"Atsushi Tsuruta, Kazumasa Miyake","doi":"10.7566/jpsj.93.015002","DOIUrl":"https://doi.org/10.7566/jpsj.93.015002","url":null,"abstract":"","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"45 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139437497","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}
We present a first-principles study of the X-ray magnetic circular dichroism (XMCD) spectra for noncollinear antiferromagnets (AFMs), Mn3Ir and Mn3Sn. By calculating the projected density of states for spin, orbital, and magnetic dipole moments, we evaluated the XMCD spectra for the AFMs. We found that the contributions of the spin magnetic moment almost vanish while those from the magnetic dipole moments give finite XMCD spectra. This indicates that these AFMs are ideal systems to study the XMCD spectra originating from the magnetic dipole moment. By analyzing the magnetic symmetry with and without spin–orbit couplings, we concluded that a symmetry operation that assures a cancellation of spin magnetic moments in the case without spin–orbit couplings is crucial for this feature. We also showed that the spin–orbit couplings for the Mn 3d orbitals have little effect on the shape of the XMCD spectra.
我们对非共轭反铁磁体（AFMs）、Mn3Ir 和 Mn3Sn 的 X 射线磁圆二色性光谱（XMCD）进行了第一原理研究。通过计算自旋、轨道和磁偶极矩的投影态密度，我们评估了 AFM 的 XMCD 光谱。我们发现，自旋磁矩的贡献几乎消失，而磁偶极矩的贡献则给出了有限的 XMCD 光谱。这表明这些原子力显微镜是研究源于磁偶极矩的 XMCD 光谱的理想系统。通过分析有自旋轨道耦合和无自旋轨道耦合的磁对称性，我们得出结论：在无自旋轨道耦合的情况下，确保自旋磁矩抵消的对称操作对这一特征至关重要。我们还发现，锰 3d 轨道的自旋轨道耦合对 XMCD 光谱的形状影响很小。
{"title":"X-ray Magnetic Circular Dichroism Arising from the Magnetic Dipole Moment in Antiferromagnets","authors":"Kensuke Kurita, Takashi Koretsune","doi":"10.7566/jpsj.93.024705","DOIUrl":"https://doi.org/10.7566/jpsj.93.024705","url":null,"abstract":"We present a first-principles study of the X-ray magnetic circular dichroism (XMCD) spectra for noncollinear antiferromagnets (AFMs), Mn<sub>3</sub>Ir and Mn<sub>3</sub>Sn. By calculating the projected density of states for spin, orbital, and magnetic dipole moments, we evaluated the XMCD spectra for the AFMs. We found that the contributions of the spin magnetic moment almost vanish while those from the magnetic dipole moments give finite XMCD spectra. This indicates that these AFMs are ideal systems to study the XMCD spectra originating from the magnetic dipole moment. By analyzing the magnetic symmetry with and without spin–orbit couplings, we concluded that a symmetry operation that assures a cancellation of spin magnetic moments in the case without spin–orbit couplings is crucial for this feature. We also showed that the spin–orbit couplings for the Mn 3d orbitals have little effect on the shape of the XMCD spectra.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"3 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139471042","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}
{"title":"Acoustic Radiation Force on an Eccentric Layered Fluid Sphere Exerted by a Focused Gaussian Beam","authors":"Yuchen Zang","doi":"10.7566/jpsj.93.014401","DOIUrl":"https://doi.org/10.7566/jpsj.93.014401","url":null,"abstract":"","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"38 7","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139437278","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}
BiS2-based superconductor Eu2SrBi2S2.5Se1.5F4 has been investigated to clarify between Tc and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, Tc increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, Tc exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu2SrBi2S2.5Se1.5F4. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of Tc discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu2SrBi2S2.5Se1.5F4 was found to have three superconducting phases up to 12 GPa.
{"title":"Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4","authors":"Kento Ishigaki, Jun Gouchi, Kiyoshi Torizuka, Sonachalam Arumugam, Ashok Kumar Ganguli, Zeba Haque, Kalaiselven Ganesan, Gohil Singh Thakur, Yoshiya Uwatoko","doi":"10.7566/jpsj.93.024706","DOIUrl":"https://doi.org/10.7566/jpsj.93.024706","url":null,"abstract":"BiS<sub>2</sub>-based superconductor Eu<sub>2</sub>SrBi<sub>2</sub>S<sub>2.5</sub>Se<sub>1.5</sub>F<sub>4</sub> has been investigated to clarify between <i>T</i><sub>c</sub> and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, <i>T</i><sub>c</sub> increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, <i>T</i><sub>c</sub> exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu<sub>2</sub>SrBi<sub>2</sub>S<sub>2.5</sub>Se<sub>1.5</sub>F<sub>4</sub>. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of <i>T</i><sub>c</sub> discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu<sub>2</sub>SrBi<sub>2</sub>S<sub>2.5</sub>Se<sub>1.5</sub>F<sub>4</sub> was found to have three superconducting phases up to 12 GPa.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139468994","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}
We investigated the superconducting properties of a palladium hydride (PdHx; x = H/Pd) film with a thickness of ∼100 nm prepared by a low-temperature hydrogen (H) absorption method. H atoms were loaded to a Pd film in H2 gas pressure of ∼0.25 MPa at temperatures of T = 180 and 150 K. At T = 180 K, after the resistivity variation due to H absorption was almost stopped, the PdHx film was cooled rapidly to low temperatures for the resistivity measurements. A superconducting transition was observed at Tc ∼ 1.1 K, where the transition width is smaller than 0.1 K. This indicates that a high-quality sample with a sharp transition can be obtained by providing sufficient time for H absorption. At T = 150 K, although the resistivity variation remained, the film was cooled. The transition temperature Tc increased to ∼2.1 K, whereas the transition width increased owing to the inhomogeneity of the H concentration in the film. Curiously, regardless of the H homogeneity, there remained a similar T-dependent residual resistivity in both films prepared at T = 180 and 150 K after the superconducting transition. This implies that the observed residual resistivity is essential for the future of the system, although its origin is not clear.
我们研究了用低温氢（H）吸收法制备的厚度为 ∼100 nm 的氢化钯（PdHx；x = H/Pd）薄膜的超导特性。在温度为 T = 180 和 150 K 时，在氢气压力为 ∼ 0.25 MPa 的条件下将氢原子加载到钯薄膜上。在温度为 T = 180 K 时，当氢吸收引起的电阻率变化基本停止后，将 PdHx 薄膜迅速冷却到低温，以进行电阻率测量。在 Tc ∼ 1.1 K 处观察到超导转变，转变宽度小于 0.1 K。在 T = 150 K 时，虽然电阻率变化依然存在，但薄膜已经冷却。转变温度 Tc 上升到 ∼2.1 K，而由于薄膜中 H 浓度的不均匀性，转变宽度增加了。奇怪的是，无论 H 是否均匀，在 T = 180 和 150 K 时制备的两层薄膜在超导转变后仍存在类似的随 T 变化的残余电阻率。这意味着观察到的残余电阻率对系统的未来至关重要，尽管其起源尚不清楚。
{"title":"Resistivity Measurements in Palladium Hydride Film Prepared by Low-Temperature Hydrogen Absorption Method","authors":"Ryoma Kato, Ten-ichiro Yoshida, Riku Iimori, Tai Zizhou, Masanobu Shiga, Yuji Inagaki, Takashi Kimura, Tatsuya Kawae","doi":"10.7566/jpsj.93.024703","DOIUrl":"https://doi.org/10.7566/jpsj.93.024703","url":null,"abstract":"We investigated the superconducting properties of a palladium hydride (PdH<i><sub>x</sub></i>; <i>x</i> = H/Pd) film with a thickness of ∼100 nm prepared by a low-temperature hydrogen (H) absorption method. H atoms were loaded to a Pd film in H<sub>2</sub> gas pressure of ∼0.25 MPa at temperatures of <i>T</i> = 180 and 150 K. At <i>T</i> = 180 K, after the resistivity variation due to H absorption was almost stopped, the PdH<i><sub>x</sub></i> film was cooled rapidly to low temperatures for the resistivity measurements. A superconducting transition was observed at <i>T</i><sub>c</sub> ∼ 1.1 K, where the transition width is smaller than 0.1 K. This indicates that a high-quality sample with a sharp transition can be obtained by providing sufficient time for H absorption. At <i>T</i> = 150 K, although the resistivity variation remained, the film was cooled. The transition temperature <i>T</i><sub>c</sub> increased to ∼2.1 K, whereas the transition width increased owing to the inhomogeneity of the H concentration in the film. Curiously, regardless of the H homogeneity, there remained a similar <i>T</i>-dependent residual resistivity in both films prepared at <i>T</i> = 180 and 150 K after the superconducting transition. This implies that the observed residual resistivity is essential for the future of the system, although its origin is not clear.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"81 3 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139422832","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}
We propose a numerical method to simulate a transport experiment using a quantum dot interferometer made of two quantum wires in parallel [S. Takada et al., Phys. Rev. Lett. 113, 126601 (2014)]. The wires are partly tunnel-coupled to each other to form a mesoscopic ring with an embedded quantum dot. Our method consists of two stages. In the first stage, we represent the experimental system with a tight-binding model by discretizing the space. The conductance around a Coulomb peak is evaluated as a function of magnetic field in four-terminal geometry, where the Coulomb interaction is irrelevant. We show clear Aharonov–Bohm (AB) oscillations despite the multiple conduction channels and magnetic field inside the wires. In the second stage, we adopt a model of double quantum dot (DQD) in parallel. The model parameters are chosen to reproduce the Coulomb peak and AB oscillations obtained in the first stage in the absence of the Coulomb interaction U. Finally, we calculate the conductance in the Kondo valley using the DQD model in the presence of U. We observe phase locking at π/2, which is consistent with experimental results.
{"title":"Numerical Simulation of Quantum Dot Interferometer in Kondo Regime","authors":"Yujie Zhang, Makoto Kato, Rui Sakano, Mikio Eto","doi":"10.7566/jpsj.93.024702","DOIUrl":"https://doi.org/10.7566/jpsj.93.024702","url":null,"abstract":"We propose a numerical method to simulate a transport experiment using a quantum dot interferometer made of two quantum wires in parallel [S. Takada et al., Phys. Rev. Lett. <b>113</b>, 126601 (2014)]. The wires are partly tunnel-coupled to each other to form a mesoscopic ring with an embedded quantum dot. Our method consists of two stages. In the first stage, we represent the experimental system with a tight-binding model by discretizing the space. The conductance around a Coulomb peak is evaluated as a function of magnetic field in four-terminal geometry, where the Coulomb interaction is irrelevant. We show clear Aharonov–Bohm (AB) oscillations despite the multiple conduction channels and magnetic field inside the wires. In the second stage, we adopt a model of double quantum dot (DQD) in parallel. The model parameters are chosen to reproduce the Coulomb peak and AB oscillations obtained in the first stage in the absence of the Coulomb interaction <i>U</i>. Finally, we calculate the conductance in the Kondo valley using the DQD model in the presence of <i>U</i>. We observe phase locking at <i>π</i>/2, which is consistent with experimental results.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"266 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139421342","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}
We performed time-resolved pump–probe measurements using rare-earth iron garnet Gd3/2Yb1/2BiFe5O12 as a two-sublattice ferrimagnet. We measured the initial phases of the magnetic resonance modes below and above the magnetization compensation temperature to clarify the sublattice selectivity of the inverse Faraday effect in ferrimagnets. A comparison of the time evolution of magnetization estimated using the equations of motion revealed that the inverse Faraday effect occurring in ferrimagnetic materials has sublattice selectivity. This is in striking contrast to antiferromagnets, in which the inverse Faraday effect acts on each sublattice identically. The initial phase analysis can be applied to other ferrimagnets with compensation temperatures.
{"title":"Sublattice-Selective Inverse Faraday Effect in Ferrimagnetic Rare-Earth Iron Garnet","authors":"Toshiki Hiraoka, Ryo Kainuma, Keita Matsumoto, Kihiro T. Yamada, Takuya Satoh","doi":"10.7566/jpsj.93.023702","DOIUrl":"https://doi.org/10.7566/jpsj.93.023702","url":null,"abstract":"We performed time-resolved pump–probe measurements using rare-earth iron garnet Gd<sub>3/2</sub>Yb<sub>1/2</sub>BiFe<sub>5</sub>O<sub>12</sub> as a two-sublattice ferrimagnet. We measured the initial phases of the magnetic resonance modes below and above the magnetization compensation temperature to clarify the sublattice selectivity of the inverse Faraday effect in ferrimagnets. A comparison of the time evolution of magnetization estimated using the equations of motion revealed that the inverse Faraday effect occurring in ferrimagnetic materials has sublattice selectivity. This is in striking contrast to antiferromagnets, in which the inverse Faraday effect acts on each sublattice identically. The initial phase analysis can be applied to other ferrimagnets with compensation temperatures.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"27 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139409306","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 electronic properties of ScPdGe and ScPdSi, crystallizing in the hexagonal ZrNiAl and orthorhombic TiNiSi structures, respectively, are investigated. ScPdGe and ScPdSi are found to show bulk superconductivity below 0.9 and 1.7 K, respectively, based on electrical resistivity and heat capacity data measured using synthesized polycrystalline samples. First-principles calculations indicate the presence of large contributions of Sc 3d and Pd 4d electrons at the Fermi energy in both materials. The electronic properties and electronic states of these materials are discussed in comparison with those of several superconductors containing scandium and a 4d transition metal element.
{"title":"Superconductivity in Ternary Germanide ScPdGe and Silicide ScPdSi","authors":"Yusaku Shinoda, Yoshihiko Okamoto, Youichi Yamakawa, Hiroshi Takatsu, Hiroshi Kageyama, Daigorou Hirai, Koshi Takenaka","doi":"10.7566/jpsj.93.023701","DOIUrl":"https://doi.org/10.7566/jpsj.93.023701","url":null,"abstract":"The electronic properties of ScPdGe and ScPdSi, crystallizing in the hexagonal ZrNiAl and orthorhombic TiNiSi structures, respectively, are investigated. ScPdGe and ScPdSi are found to show bulk superconductivity below 0.9 and 1.7 K, respectively, based on electrical resistivity and heat capacity data measured using synthesized polycrystalline samples. First-principles calculations indicate the presence of large contributions of Sc 3<i>d</i> and Pd 4<i>d</i> electrons at the Fermi energy in both materials. The electronic properties and electronic states of these materials are discussed in comparison with those of several superconductors containing scandium and a 4<i>d</i> transition metal element.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"80 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027781","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}
More real situations have been rendered as nonlinear fractional partial differential equations (nfPDEs), which is why the seeking of the exact traveling wave solutions and studying the wave behavior of these equations are very important in many fields of mathematical physics. The nonlinear space-time fractional Ablowitz–Kaup–Newell–Segur (AKNS) equation and the nonlinear space-time fractional Estevez–Mansfield–Clarkson (EMC) equation presented the movement of waves in shallow water. Solving these equations required the Jumarie’s Riemann–Liouville derivative to transform nfPDEs to nonlinear ordinary differential equations (nODEs) and the collaboration of the simple equation (SE) method with Riccati equation. The new results of these equations are displayed in hyperbolic tangent forms and tangent forms. The wave behaviors, kink and periodic waves are shown in 2-D, 3-D, and contour graphs. Moreover, the solutions analysis also shows that these solutions have a structure that is not only more appropriate but also simpler.
{"title":"New Wave Behaviors Generated by Simple Equation Method with Riccati Equation of Some Fourth-Order Fractional Water Wave Equations","authors":"Weerachai Thadee, Sirasrete Phoosree","doi":"10.7566/jpsj.93.014002","DOIUrl":"https://doi.org/10.7566/jpsj.93.014002","url":null,"abstract":"More real situations have been rendered as nonlinear fractional partial differential equations (nfPDEs), which is why the seeking of the exact traveling wave solutions and studying the wave behavior of these equations are very important in many fields of mathematical physics. The nonlinear space-time fractional Ablowitz–Kaup–Newell–Segur (AKNS) equation and the nonlinear space-time fractional Estevez–Mansfield–Clarkson (EMC) equation presented the movement of waves in shallow water. Solving these equations required the Jumarie’s Riemann–Liouville derivative to transform nfPDEs to nonlinear ordinary differential equations (nODEs) and the collaboration of the simple equation (SE) method with Riccati equation. The new results of these equations are displayed in hyperbolic tangent forms and tangent forms. The wave behaviors, kink and periodic waves are shown in 2-D, 3-D, and contour graphs. Moreover, the solutions analysis also shows that these solutions have a structure that is not only more appropriate but also simpler.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"44 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138744568","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}
Monolayers of ABTe4 (A/B = Ti, Zr, Hf) were theoretically predicted to be two-dimensional topological insulators, but little has been known about the physical properties of these compounds. Here, we report on the single crystal growth, bulk transport properties, and band structure calculations of these compounds. The magnetotransport properties indicate that all three compounds are multi-carrier systems. The experimental results of ZrTiTe4 and HfTiTe4 can be well fitted by the multi-carrier formula assuming two types of carriers, while three carrier components were necessary for HfZrTe4. Interestingly, one of the carrier mobilities of HfZrTe4 exceeded 1000 cm2 V−1 s−1, which was nearly one order in magnitude larger than the carrier mobilities of ZrTiTe4 and HfTiTe4. Our band structure calculations showed that all three compounds are semimetals consistent with the magnetotransport properties. The band structure around the Γ-point of HfZrTe4 exhibits features that are distinct from the other two compounds, which is likely the reason of the different carrier properties.
{"title":"Single Crystal Growth and Transport Properties of van der Waals Materials ABTe4 (A/B = Ti, Zr, Hf)","authors":"Yuto Hasuo, Takahiro Urata, Masaaki Araidai, Yuji Tsuchiya, Satoshi Awaji, Hiroshi Ikuta","doi":"10.7566/jpsj.93.014705","DOIUrl":"https://doi.org/10.7566/jpsj.93.014705","url":null,"abstract":"Monolayers of <i>AB</i>Te<sub>4</sub> (<i>A</i>/<i>B</i> = Ti, Zr, Hf) were theoretically predicted to be two-dimensional topological insulators, but little has been known about the physical properties of these compounds. Here, we report on the single crystal growth, bulk transport properties, and band structure calculations of these compounds. The magnetotransport properties indicate that all three compounds are multi-carrier systems. The experimental results of ZrTiTe<sub>4</sub> and HfTiTe<sub>4</sub> can be well fitted by the multi-carrier formula assuming two types of carriers, while three carrier components were necessary for HfZrTe<sub>4</sub>. Interestingly, one of the carrier mobilities of HfZrTe<sub>4</sub> exceeded 1000 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>, which was nearly one order in magnitude larger than the carrier mobilities of ZrTiTe<sub>4</sub> and HfTiTe<sub>4</sub>. Our band structure calculations showed that all three compounds are semimetals consistent with the magnetotransport properties. The band structure around the Γ-point of HfZrTe<sub>4</sub> exhibits features that are distinct from the other two compounds, which is likely the reason of the different carrier properties.","PeriodicalId":17304,"journal":{"name":"Journal of the Physical Society of Japan","volume":"29 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138746051","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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