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Thermodynamics of localized magnetic moments in a Dirac conductor

Cheianov, V. and Szyniszewski, Marcin and Burovski, E. and Sherkunov, Yury and Falko, Vladimir (2012) Thermodynamics of localized magnetic moments in a Dirac conductor. Physical review b, 86 (5). -. ISSN 1098-0121

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Abstract

We show that the magnetic susceptibility of a dilute ensemble of magnetic impurities in a conductor with a relativistic electronic spectrum is nonanalytic in the inverse temperature at T-1 -> 0. We derive a general theory of this effect and construct the high-temperature expansion for the disorder averaged susceptibility to any order, convergent at all temperatures down to a possible ordering transition. When applied to Ising impurities on a surface of a topological insulator, the proposed general theory agrees with Monte Carlo simulations, and it allows us to find the critical temperature of the ferromagnetic phase transition.

Item Type: Article
Journal or Publication Title: Physical review b
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 59039
Deposited By: ep_importer_pure
Deposited On: 09 Oct 2012 14:44
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:15
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59039

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