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Wang, Zhan; Zhou, Sen1; Chen, Weiqiang3,4; Zhang, Fu-Chun
t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta
Source PublicationPHYSICAL REVIEW B
Language英语
KeywordPHYSICS
AbstractLayered copper oxides have the highest superconducting transition temperatures at ambient pressure. Its mechanism remains a major challenge in condensed matter physics. The essential physics lying in two-dimensional copper-oxygen layers is well described by a single-band Hubbard model or its strong-coupling limit t-J model in a two-dimensional square lattice. The recently discovered high-temperature superconductor Ba2CuO3+delta with delta similar to 0.2 has a different crystal structure with a large portion of in-plane oxygen vacancies. We observe that an oxygen vacancy breaks the bond of its two neighboring copper atoms, and propose the ordered vacancies in Ba2CuO3+delta lead to an extended t-J model on an effective brick-wall lattice. For the nearest-neighbor hopping, the brick-wall model can be mapped onto the t-J model on a honeycomb lattice. Our theory explains the superconductivity of Ba2CuO3+delta at a high charge carrier density, and predicts a time-reversal symmetry-broken pairing state.
2020
ISSN2469-9950
Volume101Issue:18Pages:180509
Cooperation Status国内
Subject AreaMaterials Science ; Physics
MOST Discipline CatalogueMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
DOI10.1103/PhysRevB.101.180509
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27119
CollectionSCI期刊论文
Affiliation1.Univ Chinese Acad Sci, Kayli Inst Theoret Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China
4.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhan,Zhou, Sen,Chen, Weiqiang,et al. t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta[J]. PHYSICAL REVIEW B,2020,101(18):180509.
APA Wang, Zhan,Zhou, Sen,Chen, Weiqiang,&Zhang, Fu-Chun.(2020).t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta.PHYSICAL REVIEW B,101(18),180509.
MLA Wang, Zhan,et al."t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta".PHYSICAL REVIEW B 101.18(2020):180509.
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