Analogy between Three-Dimensional Helimagnetic Metals and Two-Dimensional Nonmagnetic Metals: Transport in the Weak-Disorder Regime

TL;DR

This paper introduces a quasi-particle model for metallic helimagnets, revealing a linear temperature dependence of electrical conductivity in weak-disorder 3D systems, akin to 2D nonmagnetic metals, with opposite sign effects.

Contribution

It proposes a simple quasi-particle model that captures the transport properties of helimagnets, highlighting an effective 2D behavior in 3D materials under weak disorder.

Findings

Linear temperature dependence of conductivity in 3D helimagnets

Effective 2D behavior of bulk helimagnets

Opposite sign of the effect compared to nonmagnetic 2D systems

Abstract

We present a quasi-particle model that allows for a simple description of the electronic properties of metallic helimagnets. For weak quenched disorder, we find a leading linear temperature dependence of the electrical conductivity for 3-d materials. This is reminiscent of the behavior of nonmagnetic 2-d systems, and reflects a general tendency of certain properties of bulk helimagnets to appear effectively 2-d. The sign of the effect is opposite to that in nonmagnetic 2-d materials. These surprising predictions should be observable in weak helimagnets.