Magnetism in semiconductors: A dynamical mean field study of ferromagnetism in Ga_{1-x}Mn_xAs

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dc.creatorAryanpour, K.
dc.creatorMoreno, J.
dc.creatorJarrell, M.
dc.creatorFishman, R. S.
dc.date2004-02-10
dc.date.accessioned2026-07-07T02:56:25Z
dc.date.available2026-07-07T02:56:25Z
dc.descriptionWe employ the dynamical mean field approximation to perform a systematic study of magnetism in Ga_{1-x}Mn_xAs. Our model incorporates the effects of the strong spin-orbit coupling on the J=3/2 GaAs valence bands and of the exchange interaction between the randomly distributed magnetic ions and the itinerant holes. The ferromagnetic phase transition temperature T_c is obtained for different values of the impurity-hole coupling J_c and of the hole concentration n_h at the Mn doping of x=0.05. We also investigate the temperature dependence of the local magnetization and spin polarization of the holes. By comparing our results with those for a single band Hamiltonian in which the spin-orbit coupling is switched off, we conclude that the spin-orbit coupling in Ga_{1-x}Mn_xAs gives rise to frustration in the ferromagnetic order, strengthening recent findings by Zarand and Janko (Phys. Rev. Lett. 89, 047201 (2002)).
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0402289
dc.identifierhttp://arxiv.org/abs/cond-mat/0402289
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23314
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleMagnetism in semiconductors: A dynamical mean field study of ferromagnetism in Ga_{1-x}Mn_xAs
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