Magnetic dephasing in mesoscopic spin glasses

Thibaut Capron 1 Guillaume Forestier 1 Angela Perrat-Mabilon 2 Christophe Peaucelle 2 Tristan Meunier 1 Christopher Bäuerle 1 Laurent Lévy 1 David Carpentier 3 Laurent Saminadayar 4
1 QuantECA - Circuits électroniques quantiques Alpes
NEEL - Institut Néel
2 IPNL - Institut de Physique Nucléaire de Lyon
3 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
4 TPS - Thermodynamique et biophysique des petits systèmes
NEEL - Institut Néel
Abstract : We have measured Universal Conductance Fluctuations in the metallic spin glass Ag:Mn as a function of temperature and magnetic field. From this measurement, we can access the phase coherence time of the electrons in the spin glass. We show that this phase coherence time increases with both the inverse of the temperature and the magnetic field. From this we deduce that decoherence mechanisms are still active even deep in the spin glass phase.
Keywords : Dephasing Spin Glass Mesoscopic Transport Conductance Fluctuations
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Submitted on : Friday, March 29, 2013 - 1:00:16 PM
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Thibaut Capron, Guillaume Forestier, Angela Perrat-Mabilon, Christophe Peaucelle, Tristan Meunier, et al.. Magnetic dephasing in mesoscopic spin glasses. Physical Review Letters, American Physical Society, 2013, 111, pp.187203. ⟨10.1103/PhysRevLett.111.187203⟩. ⟨ensl-00806023⟩

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