Large non-reciprocal charge transport in Pt2MnGe up to room temperature

TL;DR

This study demonstrates large non-reciprocal charge transport in Pt2MnGe films at room temperature, driven by magnetic chirality and spin configurations, with potential applications in chiral spintronics.

Contribution

It reports the first realization of room-temperature non-reciprocal charge transport in a magnetic alloy, enabled by chirality-dependent scattering and magnetic configurations.

Findings

Non-reciprocal charge transport observed up to room temperature.

Vector spin chirality can be reversed by spin-polarized current.

Potential for applications in chiral spintronics.

Abstract

Non-reciprocal charge transport that is strongly associated with the structural or magnetic chirality of the quantum materials system is one of the most exotic properties of condensed matter physics. Here, using magnetic alloys film Pt2MnGe, we have realized the large non-reciprocal charge transport up to room temperature, which roots in the organic combination of chirality dependent carrier scattering and special magnetic configurations. In this framework, the conduction electrons are scattered asymmetrically by the emerging non-zero vector spin chirality under in-plane magnetic field, resulting in robust non-reciprocal response. More astonishingly, the vector spin chirality in Pt2MnGe film can be reversed by a spin-polarized current through spin Hall effect in a junction with Pt layer. Our work resolves the general limitation of non-reciprocal charge transport to cryogenic temperatures, and paves the way for extending its applications in the emerging field of chiral spintronics.