Large-J approach to strongly coupled spin-orbital systems
Source: Phys. Rev. B 80, 180409(R) (2009); doi:10.1103/PhysRevB.80.180409
Published 11 November 2009
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Research ToolkitKEYWORDS and PACS
angular momentum,
exchange interactions (electron),
ground states,
localised states,
spin-orbit interactions,
strontium compounds
- 75.10.-b
General theory and models of magnetic ordering - 75.20.Hr
Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions - 75.30.Mb
Valence fluctuation, Kondo lattice, and heavy-fermion phenomena in magnetically ordered materials - 71.27.+a
Strongly correlated electron systems; heavy fermions - YEAR: 2009
PUBLICATION DATA
APS
We present an approach to study the ground-state and elementary excitations in compounds where spins and orbitals are entangled by on-site relativistic spin-orbit interaction. The appropriate degrees of freedom are localized states with an effective angular momentum J. We generalize J to arbitrary large values while maintaining the delicate spin-orbital entanglement. After projecting the intersite exchange interaction to the manifold of effective spins, a systematic 1/J expansion of the effective Hamiltonian is realized using the Holstein-Primakoff transformation. Applications to representative compounds Sr2IrO4 and particularly vanadium spinels AV2O4 are discussed.
©2009 The American Physical Society
| History: | Received 21 August 2009; revised 13 October 2009; published 11 November 2009 |
| Permalink: |
http://link.aps.org/abstract/PRB/v80/e180409 |
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