Thermodynamics of localized magnetic moments in a Dirac conductor

  title={Thermodynamics of localized magnetic moments in a Dirac conductor},
  author={Vadim V. Cheianov and Marcin Szyniszewski and Evgeni Burovski and Yury Sherkunov and Vladimir I. Fal’ko},
  journal={Physical Review B},
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… 

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