Anomalous Zeeman effect in SrTiO3 and its possible all-electric detection

TL;DR

This paper predicts a highly unusual Zeeman effect in SrTiO3 caused by spin-orbit coupling and symmetry breaking, which can be detected electrically and offers insights into its electronic properties.

Contribution

It introduces a novel all-electric detection method for the anomalous Zeeman effect in SrTiO3 based on spin resonance.

Findings

The Zeeman effect varies significantly among conduction sub-bands.

Electrical detection via spin resonance is feasible.

Near-degeneracy enhances the effect.

Abstract

We show that the interplay between spin-orbit coupling and cubic symmetry breaking in SrTiO3 results in a highly anomalous Zeeman effect of conduction electrons substantially different among the three conduction sub-bands and strongly dependent on their splitting. This effect can be measured via electrically-driven spin resonance enabled by the interplay between electron hopping and spin-orbit coupling, and enhanced by the near-degeneracy of the conduction sub-bands. The proposed effects can provide a unique insight into the electronic properties of SrTiO3 and its heterostructures.