Spin transport in Heisenberg antiferromagnets

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dc.creatorSentef, Michael
dc.creatorKollar, Marcus
dc.creatorKampf, Arno P.
dc.date2006-12-08
dc.date.accessioned2026-07-07T08:05:41Z
dc.date.available2026-07-07T08:05:41Z
dc.descriptionWe analyze spin transport in insulating antiferromagnets described by the XXZ Heisenberg model in two and three dimensions. Spin currents can be generated by a magnetic-field gradient or, in systems with spin-orbit coupling, perpendicular to a time-dependent electric field. The Kubo formula for the longitudinal spin conductivity is derived analogously to the Kubo formula for the optical conductivity of electronic systems. The spin conductivity is calculated within interacting spin-wave theory. In the Ising regime, the XXZ magnet is a spin insulator. For the isotropic Heisenberg model, the dimensionality of the system plays a crucial role: In d=3 the regular part of the spin conductivity vanishes linearly in the zero frequency limit, whereas in d=2 it approaches a finite zero frequency value.
dc.description9 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0612215
dc.identifierhttp://arxiv.org/abs/cond-mat/0612215
dc.identifierPhys. Rev. B 75, 214403 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.214403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/130357
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleSpin transport in Heisenberg antiferromagnets
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