Persistent spin currents without spin-orbit coupling in a spin-1/2 ring |
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| Authors: | Schmeltzer D Saxena A Bishop A R Smith D L |
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| Affiliation: | Department of Physics, City College of the City University of New York, New York, New York 10031, USA. david@sci.ccny.cuny.edu |
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| Abstract: | We 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 magnitude of the spin current is determined by the ratio of longitudinal and transverse exchange interactions J(parallel)/J(perpendicular) and by the magnetic field magnitude. |
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