Magnetic Semiconductors are Frustrated Ferromagnets

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dc.creatorZarand, Gergely
dc.creatorJanko, Boldizsar
dc.date2001-08-29
dc.date.accessioned2026-07-07T02:42:33Z
dc.date.available2026-07-07T02:42:33Z
dc.descriptionStarting from microscopic and symmetry considerations, we derive the Hamiltonian describing the exchange interaction between the localized Mn spins and the valence band holes in $Ga_{1-x}Mn_x As$. We find that due to the strong spin-orbit coupling in the valence band, this exchange interaction has a rather complex structure and generates a highly anisotropic effective interaction between the Mn spins. The corresponding ground state has a finite ferromagnetic magnetization but is intrinsically spin-disordered even at zero temperature.
dc.description4 pages RevTEx 3.0, 2 EPS figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0108477
dc.identifierhttp://arxiv.org/abs/cond-mat/0108477
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18189
dc.subjectStrongly Correlated Electrons
dc.titleMagnetic Semiconductors are Frustrated Ferromagnets
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