Soliton Wall Superlattice Charge-Density-Wave Phase in Quasi-One-Dimensional Conductor (Per)$_2$Pt(mnt)$_2$

TL;DR

This paper predicts a novel soliton wall superlattice charge-density-wave phase in a quasi-one-dimensional conductor under magnetic fields, highlighting phase transitions and the role of spin-splitting effects in stabilizing complex electronic states.

Contribution

It introduces a new SWS CDW phase stabilized by magnetic fields in (Per)$_2$Pt(mnt)$_2$, connecting it to an exactly solvable model and proposing experimental verification.

Findings

Magnetic fields improve nesting properties of the electron spectrum.

High resistance Peierls CDW phase is stabilized at high magnetic fields.

SWS CDW phase characterized by soliton and anti-soliton walls is stabilized at low and very high fields.

Abstract

We demonstrate that the Pauli spin-splitting effects in a magnetic field improve nesting properties of a realistic quasi-one-dimensional electron spectrum. As a result, a high resistance Peierls charge-density-wave (CDW) phase is stabilized in high enough magnetic fields in (Per)$_2$Pt(mnt)$_2$ conductor. We show that, in low and very high magnetic fields, the Pauli spin-splitting effects lead to a stabilization of a soliton wall superlattice (SWS) CDW phase, which is characterized by periodically arranged soliton and anti-soliton walls. We suggest experimental studies of the predicted first order phase transitions between the Peierls and SWS phases to discover a unique SWS phase. It is important that, in the absence of a magnetic field and in a limit of very high magnetic fields, the suggested model is equivalent to the exactly solvable model of Brazovskii, Dzyaloshinskii, and Kirova.