Spin-orbit coupling and electronic charge effects in Mott insulators
- Zhejiang Univ., Hangzhou (People's Republic of China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
We derive the effective charge- and current-density operators for the strong-coupling limit of a single-band Mott insulator in the presence of spin-orbit coupling and show that the spin-orbit contribution to the effective charge density leads to novel mechanisms for multiferroic behavior. In some sense, these mechanisms are the electronic counterpart of the ionic-based mechanisms, which have been proposed for explaining the electric polarization induced by spiral spin orderings. In addition, the new electronic mechanisms are illustrated by considering cycloidal and proper-screw magnetic orderings on sawtooth and kagome lattices. As for the isotropic case, geometric frustration is crucial for achieving this purely electronic coupling between spin and charge degrees of freedom.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 11074216; 11274272; AC52-06NA25396; PHYS-1066293
- OSTI ID:
- 1234260
- Alternate ID(s):
- OSTI ID: 1180285
- Report Number(s):
- LA-UR-14-28062; PRBMDO
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 19; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Frustration and chiral orderings in correlated electron systems
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journal | July 2016 |
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