Measuring overlaps in mesoscopic spin glasses via conductance fluctuations

David Carpentier (1) , Edmond Orignac (1)

1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon

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.

Mots clés: Quantum transport; conductance fluctuations; spin glass

Domaines: Systèmes désordonnés et réseaux de neurones [cond-mat.dis-nn]

David Carpentier, Edmond Orignac. Measuring overlaps in mesoscopic spin glasses via conductance fluctuations. Physical Review Letters, 2008, 100 (5), pp.057207. ⟨10.1103/PhysRevLett.100.057207⟩. ⟨ensl-00180139⟩