Properties of Odd Gap Superconductors

TL;DR

This paper explores a novel class of superconductors characterized by an odd gap function under time reversal, examining their unique physical properties and phase transitions.

Contribution

It introduces and analyzes the properties of odd gap superconductors, a new theoretical class with distinct symmetry features compared to conventional superconductors.

Findings

Exhibits Meissner effect in odd gap superconductors

Identifies a transition from odd gap to BCS state at lower temperatures

Describes a gapless spectrum in these superconductors

Abstract

A new class of superconductors with the gap function {\it odd} under time reversal is considered. Some of the physical properties of these superconductors such as the Meissner effect, composite condensate, gapless spectrum and transition from the {\it odd} gap superconductor to the BCS state at lower temperatures are discussed.