Soliton Analysis of the Electro-Optical Response of Blue Bronze

TL;DR

This paper investigates the electro-optical response of blue bronze to identify solitons created by electron injection, adapting models from polyacetylene to estimate soliton prevalence and discuss their dynamics.

Contribution

It introduces a model adaptation from polyacetylene to blue bronze, providing estimates on soliton occurrence and insights into their lifetimes and phase dislocation motion.

Findings

Current-induced solitons occur on less than ~10% of chains.

Estimated soliton lifetime and mobility implications.

Adapted soliton absorption model from polyacetylene.

Abstract

In recent measurements on the charge-density-wave (CDW) conductor blue bronze (K0.3MoO3), the electro-transmittance and electro-reflectance spectra were searched for intragap states that could be associated with solitons created by injection of electrons into the CDW at the current contacts [Eur. Phys. J. B 16, 295 (2000); ibid 35, 233 (2003)]. In this work, we adapt the model of soliton absorption in dimerized polyacetylene to the blue bronze results, to obtain the (order of magnitude) estimate that current induced solitons occur on less than ~ 10% of the conducting chains. We discuss the implications of these results on models of soliton lifetimes and motion of CDW phase dislocations.