Interchain Coupling in Quasi-One-Dimensional Superconductors

Abstract

The role of the electron hopping between chains in quasi-one-dimensional superconductors is studied based on the work by Brazovskii and Yakovenko [J. Phys. Lett. 46 (1985) L–111]. It is shown that strong intrachain interactions give rise to the tunneling of a pair of electrons in the BCS state whereas weak intrachain interactions lead to the individual electron hopping and the BCS state is destroyed.