Aharonov-Casher Effect in Wigner Crystal Exchange Interactions

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We theoretically study the effects of spin-orbit coupling on spin exchange in a low-density Wigner crystal. In addition to the familiar antiferromagnetic Heisenberg exchange, we find general anisotropic interactions in spin space if the exchange paths allowed by the crystal structure form loops in real space. In particular, it is shown that the two-electron exchange interaction can acquire ferromagnetic character.
4 pages, 1 figure

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/224000

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0809.0598
 http://arxiv.org/abs/0809.0598
 Phys. Rev. Lett. 102 (2009) 126801

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arXiv