Measuring overlaps in mesoscopic spin glasses via conductance fluctuations

TL;DR

This paper proposes a novel method to measure the overlap distribution in mesoscopic spin glasses by analyzing conductance fluctuations affected by magnetic impurities, enabling direct experimental probing of spin glass states.

Contribution

It introduces a new experimental protocol to infer spin overlaps from conductance fluctuation measurements in mesoscopic spin glasses.

Findings

Overlap distribution can be inferred from conductance fluctuation reduction.

Proposes protocols for direct experimental measurement of spin overlaps.

Connects magnetic impurity effects to spin configuration overlaps.

Abstract

We consider the electonic transport in a mesoscopic metallic spin glasses. We show that the distribution of overlaps between spin configurations can be inferred from the reduction of the conductance fluctuations by the magnetic impurities. Using this property, we propose new experimental protocols to probe spin glasses directly through their overlaps.