Localization and Chern Numbers for Weakly Disordered BdG Operators

Drabkin, Maxim; Schulz-Baldes, Hermann

Keywords: anderson localization, weak disorder, random Bogoliubov-de Gennes operators

Abstract

After a short discussion of various random Bogoliubov-de Gennes (BdG) model operators and the associated physics, the Aizenman-Molchanov method is applied to prove Anderson localization in the weak disorder regime for the spectrum in the central gap. This allows to construct random BdG operators which have localized states in an interval centered at zero energy. Furthermore, techniques for the calculation of Chern numbers are reviewed and applied to two non-trivial BdG operators, the p+ıp wave and d+ıd wave superconductors.

Más información

Título de la Revista: Markov Processes and Related Fields
Volumen: 21
Número: 2
Editorial: Polymat Ltd.
Fecha de publicación: 2015
Página de inicio: 463
Página final: 482
Idioma: English
Notas: ISI, SCOPUS