Influence of substrate charge on electron transport in narrow conducting channel

TL;DR

This study investigates how substrate charge affects electron transport in narrow conducting channels on liquid helium, revealing temperature-independent conductivity due to carrier localization and polaron formation.

Contribution

It demonstrates the impact of substrate charge on electron transport and introduces the role of localization and polarons in this context.

Findings

Conductivity becomes temperature-independent at certain substrate charges.

Localization of carriers explains the observed transport behavior.

Electron polarons are involved in the conduction process.

Abstract

The electron transport in inhomogeneous quasi-one-dimensional conducting channels on the liquid helium surface are studied in the temperature range 0.6-1.5 K. Inhomogeneities are created by charging the substrate on which the conducting channels are formed. It has been established that the electron conductivity practically does not depend on temperature at some substrate charge. The results obtained are explained by localization of carriers and creation of electron polarons.