Charge-Density-Wave like Behavior in the One-Dimensional Charge-Ordered Semiconductor (NbSe4)3I

TL;DR

This study uses broadband dielectric spectroscopy to reveal charge-density-wave-like behavior in (NbSe4)3I, a one-dimensional semiconductor, showing colossal dielectric constants linked to a structural phase transition driven by charge ordering.

Contribution

It demonstrates charge-density-wave-like phenomena in (NbSe4)3I and links dielectric properties to a structural phase transition caused by charge ordering.

Findings

Colossal dielectric constants observed below 270 K

Dielectric behavior similar to canonical charge-density wave systems

Structural transition driven by complex charge-order processes

Abstract

We report on broadband dielectric spectroscopy on the one-dimensional semiconductor (NbSe4)3I. Below the structural phase transition close to 270 K we observe colossal dielectric constants with a frequency and temperature dependence very similar to what is observed in canonical charge-density wave systems. Guided by structural details we interpret this structural phase transition as driven by complex charge-order processes.