Multitude of phases in correlated lattice fermion systems with spin-dependent disorder

  • The magnetic phases induced by the interplay between disorder acting only on particles with a given spin projection (‘spin-dependent disorder’) and a local repulsive interaction is explored. To this end the magnetic ground state phase diagram of the Hubbard model at half-filling is computed within dynamical mean-field theory combined with the geometric average over disorder, which is able to describe Anderson localization. Five distinct phases are identified: a ferromagnetically polarized metal, two types of insulators, and two types of spin-selective localized phases. The latter four phases possess different long-range order of the spins. The predicted phase diagram may be tested experimentally using cold fermions in optical lattices subject to spin-dependent random potentials.

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Author:J. Skolimowski, Dieter VollhardtGND, Krzysztof Byczuk
Frontdoor URL
Parent Title (English):Journal of Physics Communications
Publisher:IOP Publishing
Place of publication:Bristol
Year of first Publication:2018
Publishing Institution:Universität Augsburg
Release Date:2019/09/04
First Page:025031
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik III
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):CC-BY 3.0: Creative Commons - Namensnennung (mit Print on Demand)