Superconducting Instability in a 1D lattice of Berry Phase Molecules

TL;DR

This paper investigates a one-dimensional lattice model where conduction electrons interact with local vibronic modes, revealing a strong tendency towards superconductivity driven by charge density wave coupling.

Contribution

It introduces a 1D model with degenerate conduction states and demonstrates its propensity for superconductivity due to charge density wave interactions.

Findings

Superconductivity is strongly favored in the model.

The order parameter's scaling dimension is approximately 1/4.

Superconducting pairing arises from coupling of charge density waves.

Abstract

We study the 1D model of conduction electrons interacting with local vibronic modes. States in the conduction band are two-fold degenerate both in orbital index and spin. It is shown that such 1D system has a strong tendency to superconductivity. The superconducting pairing originates from coupling of two charge density waves; the scaling dimension of the order parameter is close to 1/4.