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PHYSICS
Indirect interaction of impurity spins on the surface of topological insulators
A. V. Tеna, M. B. Belonenkob a Volgograd State University, Volgograd, Russia
b Volgograd Institute of Business, Volgograd, Russia
Аннотация:
In this work, a mathematical model to study the indirect interaction in topological insulators was constructed. Analysis of the model was carried out numerically. We have calculated the indirect exchange interaction in the film of a topological insulator, for example Bi$_2$Te$_3$, within the s-d model. The calculations showed that the magnetic ordering of the impurity spins varies periodically with increasing distance between atoms, asymptotically decreasing to zero. $\lambda$ is a parameter associated with hexagonal distortion and is a component of the dispersion relation. The dependence of the constants of the effective exchange interaction upon the $\lambda$ parameter is shown; this parameter characterizes the crystal lattice geometry for a topological insulator.
Ключевые слова:
topological insulators, impurity spin, indirect exchange, s-d model.
Поступила в редакцию: 23.01.2017 Исправленный вариант: 28.02.2017 Принята в печать: 26.05.2017
Образец цитирования:
A. V. Tеn, M. B. Belonenko, “Indirect interaction of impurity spins on the surface of topological insulators”, Наносистемы: физика, химия, математика, 8:3 (2017), 386–390
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/nano53 https://www.mathnet.ru/rus/nano/v8/i3/p386
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Страница аннотации: | 56 | PDF полного текста: | 11 |
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