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 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.
CNRS, Institut Néel, B.P. 166, 38042 Grenoble Cedex 09, France.
Thibaut
T
Capron
Guillaume
G
Forestier
Angela
A
Perrat-Mabilon
Christophe
C
Peaucelle
Tristan
T
Meunier
Christopher
C
Bäuerle
Laurent P
LP
Lévy
David
D
Carpentier
Laurent
L
Saminadayar