Spatially anisotropic kagome antiferromagnet with Dzyaloshinskii-Moriya interaction

TL;DR

This paper investigates how Dzyaloshinskii-Moriya interactions influence the magnetic phases of a spatially anisotropic kagome antiferromagnet, revealing phase transitions and ordering behaviors using renormalization group analysis.

Contribution

It provides a theoretical analysis of the phase diagram of the anisotropic kagome antiferromagnet with DM interaction, identifying critical interaction strengths and resulting magnetic orders.

Findings

Weak DM interaction leads to a spiral phase.

Strong DM interaction causes coexistence of antiferromagnetic and dimer order.

Identifies critical DM strength for phase transition.

Abstract

We theoretically study the spatially anisotropic spin-1/2 kagome antiferromagnet with Dzyaloshinskii-Moriya (DM) interaction using a renormalization group analysis in the quasi-one-dimensional limit. We identify the various temperature and energy scales for ordering in the system. For very weak DM interaction, we find a low-temperature spiral phase with the plane of the spiral selected by the DM interaction. This phase is similar to a previously identified phase in the absence of the DM interaction. However, above a critical DM interaction strength we find a transition to a phase with coexisting antiferromagnetic and dimer order, reminiscent of one-dimensional antiferromagnetic systems with a uniform DM interaction. Our results help shed light on the fate of two dimensional systems with both strong interactions and significant spin-orbit coupling.