Electron coherence at low temperatures: The role of magnetic impurities
arXiv:0709.4663 · doi:10.1016/j.physe.2007.05.026
Abstract
We review recent experimental progress on the saturation problem in metallic quantum wires. In particular, we address the influence of magnetic impurities on the electron phase coherence time. We also present new measurements of the phase coherence time in ultra-clean gold and silver wires and analyse the saturation of \tauphi in these samples, cognizant of the role of magnetic scattering. For the cleanest samples, Kondo temperatures below 1 mK and extremely-small magnetic-impurity concentration levels of less than 0.08 ppm have to be assumed to attribute the observed saturation to the presence of magnetic impurities.
review article, 14 pages, 11 figures. Physica E (in press)
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Cited by in corpus (8)
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- Enhanced electron dephasing in three-dimensional topological insulators
- Weak localization in a system with a barrier: Dephasing and weak Coulomb blockade
- Ergodic vs diffusive decoherence in mesoscopic devices
- Observation of long phase-coherence length in epitaxial La-doped CdO thin films
- Al'tshuler-Aronov correction to the conductivity of a large metallic square network
- Measurement of Aharonov-Bohm oscillations in mesoscopic metallic rings in the presence of high-frequency electromagnetic fields
- Low temperature dephasing in irradiated metallic wires