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Proceedings Paper

Phonon-induced superconductivity in a self-consistent Hubbard model (Conference Presentation)
Author(s): Enrique Munoz; Edson Vernek; Victor Apel
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Paper Abstract

We have studied an infinite Hubbard chain with a spin-orbit coupling term, submitted to a uniform magnetic field as well as local phonons. By means of a Lang-Firsov transformation, we show that an effective interacting fermion model emerges. Moreover, a self-consistent mean-field theory of this model, formulated in terms of thermal Green's functions, shows that a BCS term emerges, thus leading to a superconducting phase transition at zero temperature. We find analytical expressions for the phase boundary, that agree well with exact numerical diagonalization of the Hamiltonian.

Paper Details

Date Published: 11 October 2017
Proc. SPIE 10357, Spintronics X, 103571L (11 October 2017); doi: 10.1117/12.2276951
Show Author Affiliations
Enrique Munoz, Pontificia Univ. Católica de Chile (Chile)
Edson Vernek, Univ. Federal de Uberlândia (Brazil)
Victor Apel, Univ. Católica del Norte (Chile)

Published in SPIE Proceedings Vol. 10357:
Spintronics X
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi; Henri Jaffrès, Editor(s)

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