Valley polarized magnetic state in hole-doped mono layers of transition metal dichalcogenides

TL;DR

This paper predicts a valley-polarized ferromagnetic phase in hole-doped transition metal dichalcogenide monolayers, characterized by spin and valley polarization with observable anomalous Hall effects, driven by electron-electron interactions.

Contribution

It introduces a theoretical phase diagram showing the emergence of a valley-polarized ferromagnetic state in hole-doped monolayers considering spin-orbit and electron interactions.

Findings

System exhibits instability to ferromagnetic phase with valley and spin polarization.

The phase shows anomalous charge and spin Hall responses.

Potential for experimental detection through Hall measurements.

Abstract

We compute the valley/magnetic phase diagram of mono layers of transition metal dichalcogenides in the hole doped region where spin-orbit effects are particularly relevant. Taking into account the moderate to high local electron-electron interactions due to the presence of transition metal atoms, we show that the system is unstable to an itinerant ferromagnetic phase where all charge carriers are spin and valley polarized. This phase shows an anomalous charge Hall and anomalous spin-Hall response, and may thus be detected experimentally.