Exchange and spin-orbit induced phenomena in diluted (Ga, Mn) As from first principles

0470822 - FZÚ 2017 RIV US eng J - Journal Article
Kudrnovský, Josef - Drchal, Václav - Turek, Ilja
Exchange and spin-orbit induced phenomena in diluted (Ga, Mn) As from first principles.
Physical Review B. Roč. 94, č. 5 (2016), 1-8, č. článku 054428. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA ČR GA15-13436S
Institutional support: RVO:68378271 ; RVO:68081723
Keywords : GaMnAs * Curie temperature * spin-stiffness * anisotropic magnetoresistance * anomalous Hall effect * Gilbert damping
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.836, year: 2016

Physical properties induced by exchange interactions (Curie temperature and spin stiffness) and spin-orbit coupling (anomalous Hall effect, anisotropic magnetoresistance, and Gilbert damping) in the diluted (Ga, Mn) As ferromagnetic semiconductor are studied from first principles. Recently developed Kubo-Bastin transport theory and nonlocal torque operator formulation of the Gilbert damping as formulated in the tight-binding linear muffintin orbital method are used. The first-principles Liechtenstein mapping is employed to construct an effective Heisenberg Hamiltonian and to estimate Curie temperature and spin stiffness in the real-space random-phase approximation. Good agreement of calculated physical quantities with experiments on well-annealed samples containing only a small amount of compensating defects is obtained.
Permanent Link: http://hdl.handle.net/11104/0268372