Persistent spin currents induced by a spatially-dependent magnetic field in a spin-1/2 Heisenberg antiferromagnetic ring

Simple item page
dc.creatorSchmeltzer, D.
dc.creatorSaxena, A.
dc.creatorBishop, A. R.
dc.creatorSmith, D. L.
dc.date2004-05-27
dc.date.accessioned2026-07-07T02:58:23Z
dc.date.available2026-07-07T02:58:23Z
dc.descriptionWe show that a spatially-dependent magnetic field can induce a persistent spin current in a spin-1/2 Heisenberg antiferromagnetic ring, proportional to the solid angle subtended by the magnetic field on a unit sphere. The result is a direct consequence of Berry "parallel transport" in space. The magnitude of the spin current is determined by the ratio of longitudinal and transverse exchange interactions $J_\parallel/J_\perp$ and by the magnetic field. For large magnetic fields the Zeeman energy strongly renormalizes the Ising term giving rise to a maximum spin current. In the limit of $J_\parallel/J_\perp\ll1$ the amplitude of the current behaves like $1-(J_\parallel/J_\perp)^2$. In the opposite limit $πJ_\perp> J_\parallel>J_\perp$ the amplitude scales as $\sqrt{J_\parallel/ J_\perp}\exp{(-\sqrt{J_\parallel/J_\perp})}$.
dc.description14 pages plus one figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0405659
dc.identifierhttp://arxiv.org/abs/cond-mat/0405659
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24065
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titlePersistent spin currents induced by a spatially-dependent magnetic field in a spin-1/2 Heisenberg antiferromagnetic ring
dc.typetext

Files

Collections

arXiv