Vibronic solitons in a (nearly-) degenerate electronic system along a 1-D chain

TL;DR

This paper investigates the formation and stability of vibronic polarons in nearly-degenerate electronic systems coupled to vibrational modes, extending the vibronic coupling range and broadening the applicability of coupled solitons in one-dimensional chains.

Contribution

It introduces a new coupling operator for vibronic polaron formation, expanding the range of vibronic interactions beyond previous limits.

Findings

Extended the vibronic coupling range beyond previous limits.

Demonstrated the stability of vibronic solitons in nearly-degenerate systems.

Broadened the applicability of coupled solitons in 1-D chains.

Abstract

We consider the formation and stability of the vibronic polaron arising in a degenerate or nearly degenerate electronic system coupled to an appropriate vibrational mode. We define the electron-phonon coupling as a mixing of the electronic states by the phonon mode. Our investigation is similar to that carried out recently by Dennis Clougherty though by introducing a different coupling operator. This extends the vibronic coupling range beyond the limits set by the difference in electronic density of the progenitor bands thereby widening the applicability range of the coupled soliton.