t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta

doi:10.1103/PhysRevB.101.180509

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba2CuO3+delta
	Wang, Zhan ; Zhou, Sen 3; Chen, Weiqiang 1,5; Zhang, Fu-Chun
刊名	PHYSICAL REVIEW B
	2020
卷号	101 期号:18 页码:180509
关键词	PHYSICS
ISSN号	2469-9950
DOI	10.1103/PhysRevB.101.180509
英文摘要	Layered 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.
学科主题	Materials Science ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27119]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China 2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 3.Univ Chinese Acad Sci, Kayli Inst Theoret Sci, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China 5.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
推荐引用方式 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.