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Title: Antisymmetric Spin-Orbit Coupling in a d-p Model on a Zigzag Chain

In this paper, we theoretically investigate how an antisymmetric spin-orbit coupling emerges in electrons moving on lattice structures which are centrosymmetric but break the spatial inversion symme- try at atomic positions. We construct an effective d-p model on the simplest lattice structure, a zigzag chain of edge-sharing octahedra, with taking into account the crystalline electric field, the spin-orbit coupling, and on-site and inter-site d-p hybridizations. We show that an effective antisymmetric spin-orbit coupling arises in the sublattice-dependent form, which results in a hidden spin polarization in the band structure. Finally, we explicitly derive the effective antisymmetric spin-orbit coupling for d electrons, which not only explains the hidden spin polarization but also indicates how to enhance it.
Authors:
 [1] ;  [2] ;  [1]
  1. Univ. of Tokyo (Japan). Dept. of Applied Physics
  2. Univ. of Tokyo (Japan). Dept. of Applied Physics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Publication Date:
Report Number(s):
LA-UR-15-24623
Journal ID: ISSN 1875-3892
Grant/Contract Number:
AC52-06NA25396; 24340076; 15K05176
Type:
Accepted Manuscript
Journal Name:
Physics Procedia
Additional Journal Information:
Journal Volume: 75; Journal ID: ISSN 1875-3892
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Tokyo (Japan)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program; Japan Society for the Promotion of Science. Grant-in-Aid for Scientific Research
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; antisymmetric spin-orbit coupling; spatial inversion symmetry; d-p model; hidden spin polarization
OSTI Identifier:
1329867