Hall conductivity as bulk signature of topological transitions in superconductors

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Sacramento, PD (Autor) Outra; Araujo, MAN (Autor) Outra; Eduardo V Castro (Autor) Outra

Revista

Título: Europhysics Letters

Vol. 105

ISSN: 0295-5075

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: P-009-82R

DOI: 10.1209/0295-5075/105/37011

Abstract (EN): Topological superconductors (TSCs) may undergo transitions between phases with different topological numbers which are related to the presence of gapless (Majorana) edge states. In a TSC the charge Hall conductivity, sigma(xy), is not quantized and evolves continuously between different topological phases. Here we show that in two-dimensional Z-TSC the derivatives of sigma(xy) display sharp features signaling the topological transitions. We consider in detail the case of a triplet superconductor with p-wave symmetry in the presence of Rashba spin-orbit coupling and externally applied Zeeman spin splitting. We generalize to the cases where the normal system is already topologically non-trivial. Copyright (C) EPLA, 2014

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6