Electron dephasing near zero temperature: an experimental review

Abstract

The behavior of the electron dephasing time near zero temperature, ${\tau }_{\varphi }^0$, has recently attracted vigorous attention. This renewed interest is primarily concerned with whether ${\tau }_{\varphi }^0$ should reach a finite or an infinite value as $T\to$ 0. While it is accepted that ${\tau }_{\varphi }^0$ should diverge if there exists only electron-electron (electron-phonon) scattering, several recent measurements have found that ${\tau }_{\varphi }^0$ 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.

References in corpus (3)

• Theory of the non-equilibrium quasiparticle distribution induced by Kondo defects
• Effect of annealing on electron dephasing in three-dimensional polycrystalline metals
• Effect of Nyquist Noise on the Nyquist Dephasing Rate in 2d Electron Systems

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• Topological delocalization and tuning of surface channel separation in Bi2Se2Te Topological Insulator Thin films