Universal Field-Induced Charge-Density-Wave Phase Diagram: Theory versus Experiment

TL;DR

This paper develops a universal theoretical framework for field-induced charge-density-wave phases in layered quasi-one-dimensional conductors, showing that critical magnetic field ratios are universal and match experimental data.

Contribution

It introduces a universal theory predicting critical magnetic field ratios for FICDW phases, aligning well with experimental observations in specific materials.

Findings

Critical magnetic field ratios are universal and parameter-free.

The theory quantitatively matches experimental data.

Critical fields follow specific ratios: 0.73, 0.59, 0.49, 0.42.

Abstract

We suggest a theory of the Field-Induced Charge-Density-Wave (FICDW) phases, generated by high magnetic fields in quasi-low-dimensional conductors. We demonstrate that, in layered quasi-one-dimensional conductors, the corresponding critical magnetic fields ratios are universal and do not depend on any fitting parameter. In particular, we find that $H_1/H_0 = 0.73, \ H_2/H_0 = 0.59, H_3/H_0 = 0.49, H_4/H_0 = 0.42$, where $H_n$ is a critical field of a phase transition between the FICDW phases with numbers $n$ and $n+1$. The suggested theory is in very good qualitative and quantitative agreements with the existing experimental data in $\alpha$-(ET)$_2$KHg(SCN)$_4$ material.