2021/02/04 by Tomohiro Takayama, T. Takayama, Jiří Chaloupka +5 · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Coupling (piping) #Electron #Electronic and Structural Properties of Oxides #Electronic structure #Ion #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Magnetism #Materials science #Mott insulator #Physics #Quantum mechanics #Spin (aerodynamics) #Spin–orbit interaction #Transition metal #cond-mat.str-el
paper · pdf · doi:10.7566/jpsj.90.062001
published as J. Phys. Soc. Jpn. 90, 062001 (2021) · 31 pages, 28 figures. Submitted to J. Phys. Soc. Jpn
arxiv created 2021/02/04 · openalex created_date 2021/02/15 · openalex publication_date 2021/05/17 · arxiv updated 2021/05/19 · openalex updated_date 2026/08/05
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, ζ, 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\rm H, noncubic crystal field splitting Δ, 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.