Magnetic dephasing in mesoscopic spin glasses

Magnetic dephasing in mesoscopic spin glasses

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 inver...

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Veröffentlicht in:Physical review letters 2013-10, Vol.111 (18), p.187203-187203, Article 187203
Hauptverfasser: Capron, Thibaut, Forestier, Guillaume, Perrat-Mabilon, Angela, Peaucelle, Christophe, Meunier, Tristan, Bäuerle, Christopher, Lévy, Laurent P, Carpentier, David, Saminadayar, Laurent
Format: Artikel
Sprache:eng
Schlagworte:
Condensed Matter
Mesoscopic Systems and Quantum Hall Effect
Physics
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Zusammenfassung: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.111.187203