Microwave-Induced Dephasing in One-Dimensional Metal Wires

Abstract

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.

arXiv comment4 pages with 4 figures, paper revised, accepted by Phys Rev Lett

References in corpus (9)

• Intrinsic Decoherence in Mesoscopic Systems
• Dephasing of Electrons in Mesoscopic Metal Wires
• Interaction effects and phase relaxation in disordered systems
• Low-Temperature Saturation of the Dephasing Time and Effects of Microwave Radiation on Open Quantum Dots
• Phase Relaxation of Electrons in Disordered Conductors
• Millisecond Electron-Phonon Relaxation in Ultrathin Disordered Metal Films at Millikelvin Temperatures
• Geometry dependent dephasing in small metallic wires
• Decoherence and the Thouless Crossover in One-Dimensional Conductors
• Low-temperature dephasing in disordered conductors: experimental aspects

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• Enhanced superconductivity at the interface of W/Sr${}_2$RuO${}_4$ point contact
• Effect of Electron Interaction on Statistics of Conductance Oscillations in Open Quantum Dots: Does the Dephasing Time Saturate?
• Symmetry-dependent electron-electron interaction in coherent tunnel junctions resolved by zero bias anomaly measurements
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