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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2011, Volume 94, Issue 8, Pages 672–677
(Mi jetpl2362)
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This article is cited in 18 scientific papers (total in 18 papers)
CONDENSED MATTER
Carrier mediated ferromagnetism on the surface of a topological
insulator
V. N. Men'shova, V. V. Tugusheva, E. V. Chulkovb a Russian Research Centre "Kurchatov Institute", Moscow
b Departamento de Física de Materiales, Facultad de Quimica, UPV/EHU, San Sebastian, Basque Country
Abstract:
We study the effect of magnetic doping at the surface of a three dimensional topological insulator
(TI) on emergence of ferromagnetic ordering at the TI-surface assuming the exchange coupling between the
Dirac fermions and the dilute magnetic ions. We show that this coupling results in an uniaxial magnetic
anisotropy with out-of-plane magnetization direction. It is found that the system under consideration is
unstable with respect to a spontaneous uniform magnetization along the easy axis, which is accompanied by
opening a gap in a spectrum of the Dirac surface states. In the framework of a mean-field approach, we study
the possibility of ferromagnetic order on the magnetically doped surface of TI at different temperatures and
positions of the chemical potential.
Received: 06.09.2011
Citation:
V. N. Men'shov, V. V. Tugushev, E. V. Chulkov, “Carrier mediated ferromagnetism on the surface of a topological
insulator”, Pis'ma v Zh. Èksper. Teoret. Fiz., 94:8 (2011), 672–677; JETP Letters, 94:8 (2011), 629–634
Linking options:
https://www.mathnet.ru/eng/jetpl2362 https://www.mathnet.ru/eng/jetpl/v94/i8/p672
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Abstract page: | 279 | Full-text PDF : | 75 | References: | 41 |
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