Surface barrier effect as evidence of chiral soliton lattice formation in chiral dichalcogenide CrTa$_{3}$S$_{6}$ crystals

TL;DR

This study provides evidence of chiral soliton lattice formation in CrTa$_{3}$S$_{6}$ crystals through surface barrier effects, magnetoresistance measurements, and hysteresis analysis, revealing intrinsic properties of chiral magnetic phases.

Contribution

It demonstrates the role of surface barriers in chiral soliton lattice formation and provides experimental confirmation via magnetoresistance and hysteresis in CrTa$_{3}$S$_{6}$ crystals.

Findings

Discrete MR changes indicate chiral soliton count.

Surface barrier causes hysteresis in phase transition.

Critical magnetic fields are fixed during hysteresis cycle.

Abstract

The formation of chiral magnetic soliton lattice (CSL) is investigated in monoaxial chiral dichalcogenide CrTa$_{3}$S$_{6}$ crystals in terms of a surface barrier, which prevents a penetration of chiral solitons into the system and is an intrinsic origin of hysteresis for the continuous phase transition of nucleation-type, as discussed in the system of quantized vortices in type-II superconductors. The magnetoresistance (MR) was examined with microfabricated platelet samples in different dimensions with regard to the $c$-axis direction of the crystal. The CSL formation was confirmed by the discrete MR changes, reflecting the number of chiral solitons, as well as by the presence of surface barrier, recognized as a fixed ratio of critical magnetic fields during the hysteresis field cycle. We also argue the influence of the surface barrier in the bulk CrTa$_{3}$S$_{6}$ crystals.