Magnetic Dephasing in Mesoscopic Spin Glasses

Thibaut Capron, Guillaume Forestier, Angela Perrat-Mabilon, Christophe Peaucelle, Tristan Meunier, Christopher Bäuerle, Laurent P. Lévy, David Carpentier, and Laurent Saminadayar
Phys. Rev. Lett. 111, 187203 – Published 31 October 2013

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.

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  • Received 2 April 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.187203

© 2013 American Physical Society

Authors & Affiliations

Thibaut Capron1, Guillaume Forestier1, Angela Perrat-Mabilon2, Christophe Peaucelle2, Tristan Meunier1, Christopher Bäuerle1, Laurent P. Lévy1,4,5, David Carpentier3, and Laurent Saminadayar1,4,5,*

  • 1CNRS, Institut Néel, B.P. 166, 38042 Grenoble Cedex 09, France
  • 2Institut de Physique Nucléaire de Lyon, Université de Lyon, Université de Lyon 1, CNRS & IN2P3, 04 rue Enrico Fermi, 69622 Villeurbanne Cedex, France
  • 3Laboratoire de Physique, École Normale Supérieure de Lyon, 47 allée d’Italie, 69007 Lyon, France
  • 4Institut Néel, Université Grenoble Alpes, B.P. 53, 38041 Grenoble Cedex 09, France
  • 5Institut Universitaire de France, 103 boulevard Saint-Michel, 75005 Paris, France

  • *laurent.saminadayar@neel.cnrs.fr

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Issue

Vol. 111, Iss. 18 — 1 November 2013

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