Soliton Wall Superlattice in Quasi-One-Dimensional Conductor (Per)2Pt(mnt)2

TL;DR

This paper proposes a model explaining the high magnetic field charge-density-wave phase in (Per)2Pt(mnt)2, highlighting the role of Pauli spin-splitting in stabilizing a soliton wall superlattice phase.

Contribution

It introduces a theoretical model showing how spin-splitting enhances nesting, leading to a novel soliton wall superlattice phase in high magnetic fields.

Findings

High magnetic fields stabilize a Peierls CDW phase.

A periodic soliton wall superlattice phase is predicted at certain magnetic field ranges.

Experimental suggestions are made to observe phase transitions.

Abstract

We suggest a model to explain the appearance of a high resistance high magnetic field charge-density-wave (CDW) phase, discovered by D. Graf et al. [Phys. Rev. Lett. v. 93, 076406 (2004)] in (Per)2Pt(mnt)2. In particular, we show that the Pauli spin-splitting effects improve the nesting properties of a realistic quasi-one-dimensional electron spectrum and, therefore, a high resistance Peierls CDW phase is stabilized in high magnetic fields. In low and very high magnetic fields, a periodic soliton wall superlattice (SWS) phase is found to be a ground state. We suggest experimental studies of the predicted phase transitions between the Peierls and SWS CDW phases in (Per)2Pt(mnt)2 to discover a unique SWS phase.