Quantized spin Hall effect in Helium three-A and other p-wave paired Fermi systems

Details Quantized spin Hall effect in Helium three-A and other p-wave paired Fermi systems Quantized spin Hall effect in Helium three-A and other p-wave paired Fermi systems

2006-11-30

arxiv.org/abs/cond-mat/0612005v4

Phys. Rev. B 77, 144504 (2008) (5 pages)

Physics

Condensed Matter

Superconductivity

6 pages, revised version,

Scientific paper

In this paper we propose the quantized spin Hall effect (SHE) in the vortex state of a rotating p-wave paired Fermi system in an inhomogeneous magnetic field and in a weak periodic potential. It is the three dimensional extension of the spin Hall effect for a 3He-A superfluid film studied in Ref. [1]. It may also be considered as a generalization of the 3D quantized charge Hall effect of Bloch electrons in Ref. [2] to the spin transport. The A-phase of 3He or, more generally, the p-wave paired phase of a cold Fermi atomic gas, under suitable conditions should be a good candidate to observe the SHE, because the system has a conserved spin current (with no spin-orbit couplings).

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