Eur. Phys. J. B (2015) 88: 196
https://doi.org/10.1140/epjb/e2015-60219-x

Regular Article

Generation of localized magnetic moments in the charge-density-wave state

¹ Moscow Institute for Physics and Technology (State University), 141700 Moscow, Russia
² Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, 125412 Moscow, Russia
³ All-Russia Research Institute of Automatics, 127055 Moscow, Russia

^a e-mail: apexgreen57@gmail.com

Received: 18 March 2015
Received in final form: 4 June 2015
Published online: 3 August 2015

Abstract

We propose a mechanism explaining the generation of localized magnetic moments in charge-density-wave compounds. Our model Hamiltonian describes an Anderson impurity placed in a host material exhibiting the charge-density wave. There is a region of the model’s parameter space, where even weak Coulomb repulsion on the impurity site is able to localize the magnetic moment on the impurity. The phase diagram of a single impurity at T = 0 is mapped. To establish the connection with experiment, the thermodynamic properties of a random impurity ensemble is studied. Magnetic susceptibility of the ensemble diverges at low temperature; heat capacity as a function of the magnetic field demonstrates pronounced low field peak. Both features are consistent with experiments on orthorhombic TaS₃ and blue bronze.