Low-Temperature Dephasing in Disordered Conductors: the Effect of ``1/f'' Fluctuations

Abstract

Electronic quantum effects in disordered conductors are controlled by the dephasing rate of conduction electrons. This rate is expected to vanish with the temperature. We consider the very intriguing recently reported apparent saturation of this dephasing rate in several systems at very low temperatures. We show that the ``standard model'' of a conductor with static defects can {\em not} have such an effect. However, allowing some dynamics of the defects may produce it.

6pages

References in corpus (3)

• Decoherence and the Thouless Crossover in One-Dimensional Conductors
• Strong localization of electrons in quasi-one-dimensional conductors
• Evidence for growth of collective excitations in glasses at low temperatures

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