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题名: Correlation Effects and Hidden Spin-Orbit Entangled Electronic Order in Parent and Electron-Doped Iridates Sr2IrO4
作者: Zhou, S;  Jiang, K;  Chen, H;  Wang, ZQ
刊名: PHYSICAL REVIEW X
出版日期: 2017
卷号: 7, 期号:4, 页码:41018
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevX.7.041018
通讯作者: Zhou, S (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: Analogs of the high-T-c cuprates have been long sought after in transition metal oxides. Because of the strong spin-orbit coupling, the 5d perovskite iridates Sr2IrO4 exhibit a low-energy electronic structure remarkably similar to the cuprates. Whether a superconducting state exists as in the cuprates requires understanding the correlated spin-orbit entangled electronic states. Recent experiments discovered hidden order in the parent and electron-doped iridates, some with striking analogies to the cuprates, including Fermi surface pockets, Fermi arcs, and pseudogap. Here, we study the correlation and disorder effects in a five-orbital model derived from the band theory. We find that the experimental observations are consistent with a d-wave spin-orbit density wave order that breaks the symmetry of a joint twofold spin-orbital rotation followed by a lattice translation. There is a Berry phase and a plaquette spin flux due to spin procession as electrons hop between Ir atoms, akin to the intersite spin-orbit coupling in quantum spin Hall insulators. The associated staggered circulating J(eff) = 1/2 spin current can be probed by advanced techniques of spin-current detection in spintronics. This electronic order can emerge spontaneously from the intersite Coulomb interactions between the spatially extended iridium 5d orbitals, turning the metallic state into an electron-doped quasi-2D Dirac semimetal with important implications on the possible superconducting state suggested by recent experiments.
类目[WOS]: Physics, Multidisciplinary
项目资助者: U.S. Department of Energy, Basic Energy Sciences [DE-FG02-99ER45747] ;  Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SYS012] ;  ACP NSF [PHY-1066293]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/22183
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Recommended Citation:
Zhou, S,Jiang, K,Chen, H,et al. Correlation Effects and Hidden Spin-Orbit Entangled Electronic Order in Parent and Electron-Doped Iridates Sr2IrO4[J]. PHYSICAL REVIEW X,2017,7(4):41018.
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