Eur. Phys. J. B (2017) 90: 82
https://doi.org/10.1140/epjb/e2017-70318-3

Regular Article

General pairing mechanisms in the BCS-theory of superconductivity

¹ Mathematisches Institut, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
² School of Mathematics, Georgia Tech, Atlanta GA 30332, USA

^a e-mail: christian.hainzl@uni-tuebingen.de

Received: 20 May 2016
Received in final form: 22 September 2016
Published online: 2 May 2017

Abstract

Starting from the linearized BdG-equation we make the simple observation that pairing can occur between particles with total momenta different from zero, e.g., with equal momentum and opposite spin, in cases of an effective interaction acting in the center-of-mass coordinates.