Microwave-Induced Dephasing in One-Dimensional Metal Wires

Details Microwave-Induced Dephasing in One-Dimensional Metal Wires Microwave-Induced Dephasing in One-Dimensional Metal Wires

2005-08-08

arxiv.org/abs/cond-mat/0508208v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages with 4 figures, paper revised, accepted by Phys Rev Lett

Scientific paper

10.1103/PhysRevLett.96.086801

We report on the effect of monochromatic microwave (MW) radiation on the weak localization corrections to the conductivity of quasi-one-dimensional (1D) silver wires. Due to the improved electron cooling in the wires, the MW-induced dephasing was observed without a concomitant overheating of electrons over wide ranges of the MW power $P_{MW}$ and frequency $f$. The observed dependences of the conductivity and MW-induced dephasing rate on $P_{MW}$ and $f$ are in agreement with the theory by Altshuler, Aronov, and Khmelnitsky \cite{Alt81}. Our results suggest that in the low-temperature experiments with 1D wires, saturation of the temperature dependence of the dephasing time can be caused by an MW electromagnetic noise with a sub-pW power.

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