{"title":"A Possible Scenario for the Anomalous Temperature Dependence of the Resistivity and the Specific Heat of CeRh2As2 above the Superconducting Transition Temperature and an Origin of the Phase Transition at T = T0","authors":"Kazumasa Miyake, Atsushi Tsuruta","doi":"10.7566/jpsj.93.074702","DOIUrl":"https://doi.org/10.7566/jpsj.93.074702","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649093","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}
{"title":"Upper Limit of Pure Dephasing Time of a Paired-Qubit with Anisotropic Heisenberg Coupling","authors":"J. Inoue","doi":"10.7566/jpsj.93.073801","DOIUrl":"https://doi.org/10.7566/jpsj.93.073801","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648496","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}
Go Notake, Takemasa Kadowaki, M. Takayanagi, Tsunetomo Yamada, Tohru Higuchi
{"title":"Surface Hole-Proton Mixed Conduction of BaCe0.4Pr0.4Y0.2O3−δ Thin Film with Large Amounts of Oxygen Vacancies","authors":"Go Notake, Takemasa Kadowaki, M. Takayanagi, Tsunetomo Yamada, Tohru Higuchi","doi":"10.7566/jpsj.93.074706","DOIUrl":"https://doi.org/10.7566/jpsj.93.074706","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141647058","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}
{"title":"Dynamics of Interacting Bosons on the Sawtooth Lattice with a Flat Band","authors":"Ko Gondaira, Nobuo Furukawa, D. Yamamoto","doi":"10.7566/jpsj.93.074004","DOIUrl":"https://doi.org/10.7566/jpsj.93.074004","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646449","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}
Ryu Nakachi, Shinya Sugiyama, Yoshichika Ōnuki, Y. Homma, Dexin Li, Dai Aoki, H. Harima, R. Higashinaka, Yuji Aoki, T. Matsuda
{"title":"Single Crystal Growth and Characterization of Tetragonal EuIr4In2Ge4 with Dresselhaus-type Spin–Orbit Coupling","authors":"Ryu Nakachi, Shinya Sugiyama, Yoshichika Ōnuki, Y. Homma, Dexin Li, Dai Aoki, H. Harima, R. Higashinaka, Yuji Aoki, T. Matsuda","doi":"10.7566/jpsj.93.075001","DOIUrl":"https://doi.org/10.7566/jpsj.93.075001","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646518","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}
We propose that light can break mirror symmetries and combining symmetries with a uniform time translation, and their breaking is characterized by an off-diagonal charge conductivity. Taking periodically driven graphene as an example, we show that mirror symmetries about the $xz$ and $yz$ planes and the combining symmetries, the symmetries of combinations of the mirror operations about these planes and a uniform time translation, can be broken by linearly or circularly polarized light. We also show that this symmetry breaking induces the time-averaged off-diagonal symmetric or antisymmetric charge conductivity in a nonequilibrium steady state with linearly or circularly, respectively, polarized light. Our results are experimentally testable in pump-probe measurements. This work will pave the way for controlling mirror symmetries via light and utilizing the light-induced mirror symmetry breaking.
{"title":"Light-Induced Mirror Symmetry Breaking and Charge Transport","authors":"Naoya Arakawa, Kenji Yonemitsu","doi":"10.7566/JPSJ.93.084701","DOIUrl":"https://doi.org/10.7566/JPSJ.93.084701","url":null,"abstract":"We propose that light can break mirror symmetries and combining symmetries with a uniform time translation, and their breaking is characterized by an off-diagonal charge conductivity. Taking periodically driven graphene as an example, we show that mirror symmetries about the $xz$ and $yz$ planes and the combining symmetries, the symmetries of combinations of the mirror operations about these planes and a uniform time translation, can be broken by linearly or circularly polarized light. We also show that this symmetry breaking induces the time-averaged off-diagonal symmetric or antisymmetric charge conductivity in a nonequilibrium steady state with linearly or circularly, respectively, polarized light. Our results are experimentally testable in pump-probe measurements. This work will pave the way for controlling mirror symmetries via light and utilizing the light-induced mirror symmetry breaking.","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666833","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}
Masamichi Nakajima, H. Yokota, Taihei Wakimura, Tetsuya Takeuchi, Koya Nakamura, M. Yashima, H. Mukuda, Shigeki Miyasaka, Setsuko Tajima
Iron-based superconductor Sr$_2$VFeAsO$_3$ is composed of alternate stacking of a superconducting FeAs layer and an insulating vanadium-oxide layer with a perovskite-type structure. Electronic orders stemming from the spin and orbital degrees of freedom of V $3d$ electrons can arise in the vanadium-oxide layer, but such orders have not been confirmed so far. Here, we systematically investigate the electronic state of Sr$_2$VFeAsO$_{3-delta}$ with oxygen deficiency and demonstrate the phase diagram of Sr$_2$VFeAsO$_{3-delta}$ as a function of the $c$-axis lattice parameter, which has turned out to be a suitable measure of the amount of oxygen deficiency. We found a magnetic and structural anomaly at $sim 100$ K with a thermal hysteresis, which is manifested with the introduction of oxygen deficiency. The presence of orthorhombic distortion was revealed below the temperature at which the anomaly appears, suggestive of V orbital ordering involving the $d_{xz}$ and $d_{yz}$ orbitals. It seems that substantial fluctuations associated with the orthorhombic distortion significantly influence the electronic state of the FeAs layer. Our findings indicate that the vanadium-oxide layer plays a significant role in the electronic state of Sr$_2$VFeAsO$_{3-delta}$.
铁基超导体 Sr$_2$VFeAsO$_3$ 由超导砷化镓层和绝缘氧化钒层交替堆叠组成，具有包晶型结构。氧化钒层中可能会出现源于 V 3d$ 电子自旋和轨道自由度的电子阶，但这种阶至今尚未得到证实。在此，我们系统地研究了缺氧情况下 Sr$_2$VFeAsO$_{3-delta}$ 的电子态，并展示了 Sr$_2$VFeAsO$_{3-delta}$ 的相图与 c$ 轴晶格参数的函数关系，而 c$ 轴晶格参数被证明是缺氧量的合适测量值。我们发现在 $sim 100$ K 时存在磁性和结构异常，并伴有热滞后，这在引入缺氧后表现出来。在异常出现的温度以下，发现了正交畸变的存在，这表明涉及 $d_{xz}$ 和 $d_{yz}$ 轨道的 V 轨道有序化。看来，与正交畸变相关的大幅波动对砷化钒层的电子状态有重大影响。我们的研究结果表明，氧化钒层在 Sr$_2$VeAsO$_{3-delta}$ 的电子状态中起着重要作用。
{"title":"Role of Vanadium-Oxide Layer in Electronic State of Sr2VFeAsO3−δ with Oxygen Deficiency","authors":"Masamichi Nakajima, H. Yokota, Taihei Wakimura, Tetsuya Takeuchi, Koya Nakamura, M. Yashima, H. Mukuda, Shigeki Miyasaka, Setsuko Tajima","doi":"10.7566/JPSJ.93.054711","DOIUrl":"https://doi.org/10.7566/JPSJ.93.054711","url":null,"abstract":"Iron-based superconductor Sr$_2$VFeAsO$_3$ is composed of alternate stacking of a superconducting FeAs layer and an insulating vanadium-oxide layer with a perovskite-type structure. Electronic orders stemming from the spin and orbital degrees of freedom of V $3d$ electrons can arise in the vanadium-oxide layer, but such orders have not been confirmed so far. Here, we systematically investigate the electronic state of Sr$_2$VFeAsO$_{3-delta}$ with oxygen deficiency and demonstrate the phase diagram of Sr$_2$VFeAsO$_{3-delta}$ as a function of the $c$-axis lattice parameter, which has turned out to be a suitable measure of the amount of oxygen deficiency. We found a magnetic and structural anomaly at $sim 100$ K with a thermal hysteresis, which is manifested with the introduction of oxygen deficiency. The presence of orthorhombic distortion was revealed below the temperature at which the anomaly appears, suggestive of V orbital ordering involving the $d_{xz}$ and $d_{yz}$ orbitals. It seems that substantial fluctuations associated with the orthorhombic distortion significantly influence the electronic state of the FeAs layer. Our findings indicate that the vanadium-oxide layer plays a significant role in the electronic state of Sr$_2$VFeAsO$_{3-delta}$.","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140996749","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}
Tatsuya Suzuki, Masanori Nagao, Yuki Maruyama, S. Watauchi, Isao Tanaka
Sb- and Se-substituted CeOBiS2 single crystals have been successfully grown using CsCl/KCl flux. Sb and Se substitution dependence of the superconductivity on CeOBiS2 was investigated and the superconducting phase diagram at above 0.3 K was described. The non-linear boundary between superconductivity and non-superconductivity was revealed.
利用 CsCl/KCl 通量成功生长出了 Sb 和 Se 取代的 CeOBiS2 单晶体。研究了 Sb 和 Se 取代对 CeOBiS2 超导性的影响，并描述了 0.3 K 以上的超导相图。揭示了超导与非超导之间的非线性边界。
{"title":"Superconducting Phase Diagram of Sb and Se Substitution in CeOBiS2 Single Crystals","authors":"Tatsuya Suzuki, Masanori Nagao, Yuki Maruyama, S. Watauchi, Isao Tanaka","doi":"10.7566/JPSJ.93.054708","DOIUrl":"https://doi.org/10.7566/JPSJ.93.054708","url":null,"abstract":"Sb- and Se-substituted CeOBiS2 single crystals have been successfully grown using CsCl/KCl flux. Sb and Se substitution dependence of the superconductivity on CeOBiS2 was investigated and the superconducting phase diagram at above 0.3 K was described. The non-linear boundary between superconductivity and non-superconductivity was revealed.","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669014","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}
Takuma Tsukamoto, Kazuho Hayashi, Toshiaki Iwazumi, H. Tokoro, Kosuke Nakagawa, S. Ohkoshi
{"title":"Evaluation of Electronic Structure of Prussian Blue Analogue RbMn[Fe(CN)6] in Temperature-Induced Phase Transition Phenomena","authors":"Takuma Tsukamoto, Kazuho Hayashi, Toshiaki Iwazumi, H. Tokoro, Kosuke Nakagawa, S. Ohkoshi","doi":"10.7566/jpsj.93.044704","DOIUrl":"https://doi.org/10.7566/jpsj.93.044704","url":null,"abstract":"","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140701088","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}
We focus on a scenario of non-Hermitian bulk--boundary correspondence that uses a topological invariant defined in a bulk geometry under a modified periodic boundary condition. Although this has succeeded in describing the topological nature of various one-dimensional non-Hermitian systems, its application to two-dimensional systems has been limited to a non-Hermitian Chern insulator. Here, we adapt the scenario to a non-Hermitian quantum spin-Hall insulator to extend its applicability. We show that it properly describes the bulk--boundary correspondence in the non-Hermitian quantum spin-Hall insulator. A phase diagram derived from the bulk--boundary correspondence is shown to be consistent with spectra of the system under an open boundary condition.
{"title":"Bulk–Boundary Correspondence in a Non-Hermitian Quantum Spin-Hall Insulator","authors":"Chihiro Ishii, Y. Takane","doi":"10.7566/jpsj.92.124707","DOIUrl":"https://doi.org/10.7566/jpsj.92.124707","url":null,"abstract":"We focus on a scenario of non-Hermitian bulk--boundary correspondence that uses a topological invariant defined in a bulk geometry under a modified periodic boundary condition. Although this has succeeded in describing the topological nature of various one-dimensional non-Hermitian systems, its application to two-dimensional systems has been limited to a non-Hermitian Chern insulator. Here, we adapt the scenario to a non-Hermitian quantum spin-Hall insulator to extend its applicability. We show that it properly describes the bulk--boundary correspondence in the non-Hermitian quantum spin-Hall insulator. A phase diagram derived from the bulk--boundary correspondence is shown to be consistent with spectra of the system under an open boundary condition.","PeriodicalId":509167,"journal":{"name":"Journal of the Physical Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139250487","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}
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