Phase transitions and dynamical properties of quasi-one-dimensional structures with hydrogen bonds

TL;DR

This paper investigates the dynamical conductivity and phase transitions in quasi-one-dimensional hydrogen-bonded structures using a pseudospin-electron model, revealing how external fields and temperature influence their properties.

Contribution

It introduces a comprehensive pseudospin-electron model accounting for proton-electron interactions, external fields, and tunneling, to analyze phase transitions and dynamical conductivity in hydrogen-bonded structures.

Findings

Identified phase transition lines from uniform to charge-ordered phases.

Analyzed how dynamical conductivity varies with temperature and external field.

Determined the dependence of electron and proton concentrations on temperature and field.

Abstract

The frequency dependence of dynamical conductivity of the quasi-one-dimensional structures with hydrogen bonds is studied on the basis of pseudospin-electron model. It takes into account the proton-electron interaction, external longitudinal field h, the tunneling hopping of protons, electron transfer and direct interaction between protons. The dependences of the electron concentration and mean number of protons at the site on temperature and external field are obtained. The phase transition lines from uniform phase into charge ordered phase are determined. The dependence of dynamical conductivity on temperature and field $h$ and its changes at the phase transitions are obtained.