Electron dephasing near zero temperature: an experimental review

Details Electron dephasing near zero temperature: an experimental review Electron dephasing near zero temperature: an experimental review

2002-09-12

arxiv.org/abs/cond-mat/0209275v1

J. Phys. Soc. Jpn. 72, 7 (2003), Suppl. A

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The behavior of the electron dephasing time near zero temperature, $\tau_\phi^0$, has recently attracted vigorous attention. This renewed interest is primarily concerned with whether $\tau_\phi^0$ should reach a finite or an infinite value as $T \to$ 0. While it is accepted that $\tau_\phi^0$ should diverge if there exists only electron-electron (electron-phonon) scattering, several recent measurements have found that $\tau_\phi^0$ depends only very weakly on temperature, if at all, when $T$ is sufficiently low. This article discusses the current experimental status of "the saturation problem", and concludes that the origin(s) for this widely observed saturation are still unresolved.

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