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Electron Coherence in Mesoscopic Kondo Wires

  • Félicien Schopfer
  • Christopher BäuerleEmail author
  • Wilfried Rabaud
  • Laurent Saminadayar
Chapter
Part of the Advances in Solid State Physics book series (ASSP, volume 43)

Abstract

We present measurements of the magnetoresistance of long and narrow quasi one-dimensional gold wires containing magnetic iron impurities. The electron phase coherence time extracted from the weak antilocalisation shows a pronounced plateau in a temperature region of 300 mK - 800 mK, associated with the phase breaking due to the Kondo effect. Below the Kondo temperature, the phase coherence time increases, as expected in the framework of Kondo physics. At much lower temperatures, the phase coherence time saturates again, in contradiction with standard Fermi liquid theory. In the same temperature regime, the resistivity curve displays a characteristic maximum at zero magnetic field, associated with the formation of a spin glass state. We argue that the interactions between the magnetic moments are responsible for the low temperature saturation of the phase coherence time.

Keywords

Spin Glass Fermi Liquid Magnetic Impurity Phase Coherence Weak Localisation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Authors and Affiliations

  • Félicien Schopfer
    • 1
  • Christopher Bäuerle
    • 1
    Email author
  • Wilfried Rabaud
    • 1
  • Laurent Saminadayar
    • 1
  1. 1.Low Temperature Research Laboratory, CRTBT-CNRSGrenoble Cedex 09France

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