期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 90, 期 6, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.90.062001
关键词
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资金
- Alexander von Humboldt Foundation
- Czech Science Foundation (GACR) [GA19-16937S]
- European Research Council [669550]
The interplay between spin-orbit coupling and electron interactions has led to the emergence of complex oxides with 4d and 5d transition-metal ions as a new paradigm in correlated electron physics. These compounds exhibit a variety of spin-orbit-entangled degrees of freedom, giving rise to exotic electronic phases.
Complex oxides with 4d and 5d transition-metal ions recently emerged as a new paradigm in correlated electron physics, due to the interplay between spin-orbit coupling and electron interactions. For 4d and 5d ions, the spin-orbit coupling, zeta, can be as large as 0.2-0.4 eV, which is comparable with and often exceeds other relevant parameters such as Hund's coupling J(H), noncubic crystal field splitting Delta, and the electron hopping amplitude t. This gives rise to a variety of spin-orbit-entangled degrees of freedom and, crucially, non-trivial interactions between them that depend on the d-electron configuration, the chemical bonding, and the lattice geometry. Exotic electronic phases often emerge, including spin-orbit assisted Mott insulators, quantum spin liquids, excitonic magnetism, multipolar orderings and correlated topological semimetals. This paper provides a selective overview of some of the most interesting spin-orbit-entangled phases that arise in 4d and 5d transition-metal compounds.
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