INVESTIGADORES
LOBOS Alejandro Martin
artículos
Título:
Interplay of Disorder and Interaction in Majorana Quantum Wires
Autor/es:
ALEJANDRO M. LOBOS; ROMAN M. LUTCHYN; S. DAS SARMA
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 109 p. 146403 - 146403
ISSN:
0031-9007
Resumen:
We study the interplay between disorder and interaction in
one-dimensional topological superconductors which carry localized
Majorana zero-energy states. Using Abelian bosonization and the
perturbative renormalization group approach, we obtain the
renormalization group flow and the associated scaling dimensions of the
parameters and identify the critical points of the low-energy theory. We
predict a quantum phase transition from a topological superconducting
phase to a nontopological localized phase, and obtain the phase boundary
between these two phases as a function of the electron-electron
interaction and the disorder strength in the nanowire. Based on an
instanton analysis which incorporates the effect of disorder, we also
identify a large regime of stability of the Majorana-carrying
topological phase in the parameter space of the model