Spin-orbit mediated anisotropic spin interaction in interacting electron systems

Details Spin-orbit mediated anisotropic spin interaction in interacting electron systems Spin-orbit mediated anisotropic spin interaction in interacting electron systems

2007-09-21

arxiv.org/abs/0709.3521v2

Phys. Rev. Lett. 100, 156402 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4.1 pages, 1 figure; (v2) minor changes, published version

Scientific paper

10.1103/PhysRevLett.100.156402

We investigate interactions between spins of strongly correlated electrons subject to the spin-orbit interaction. Our main finding is that of a novel, spin-orbit mediated anisotropic spin-spin coupling of the van der Waals type. Unlike the standard exchange, this interaction does not require the wave functions to overlap. We argue that this ferromagnetic interaction is important in the Wigner crystal state where the exchange processes are severely suppressed. We also comment on the anisotropy of the exchange between spins mediated by the spin-orbital coupling.

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