The effects of KSEA interaction on the ground-state properties of spin chains in a transverse field

TL;DR

This paper investigates how the KSEA interaction influences the ground-state phases of various spin chains in a transverse field, revealing suppression of certain gapless chiral phases and the disappearance of anisotropic transitions.

Contribution

It provides the first detailed analysis of the impact of KSEA interaction on the ground-state properties of multiple spin chain models in a transverse field.

Findings

KSEA interaction eliminates the anisotropic transition in XY chains.

The gapless chiral phases shrink and vanish with increasing KSEA strength.

KSEA interaction suppresses chiral phases induced by DM and three-site interactions.

Abstract

The effects of symmetric helical interaction which is called the Kaplan, Shekhtman, Entin-Wohlman, and Aharony (KSEA) interaction on the ground-state properties of three kinds of spin chains in a transverse field have been studied by means of correlation functions and chiral order parameter. We find that the anisotropic transition of $XY$ chain in a transverse field ($XY$TF) disappears because of the KSEA interaction. For the other two chains, we find that the regions of gapless chiral phases in the parameter space induced by the DM or $XZY-YZX$ type of three-site interaction are decreased gradually with increase of the strength of KSEA interaction. When it is larger than the coefficient of DM or $XZY-YZX$ type of three-site interaction, the gapless chiral phases also disappear.