Geometry dependent dephasing in small metallic wires

Abstract

Temperature dependent weak localization is measured in metallic nanowires in a previously unexplored size regime down to width $w=5$ nm. The dephasing time, ${\tau }_{\varphi }$, shows a low temperature $T$ dependence close to quasi-1D theoretical expectations (${\tau }_{\varphi }\sim T^{-2/3}$) in the narrowest wires, but exhibits a relative saturation as $T\to 0$ for wide samples of the same material, as observed previously. As only sample geometry is varied to exhibit both suppression and divergence of ${\tau }_{\varphi }$, this finding provides a new constraint on models of dephasing phenomena.

6 pages, 3 figures

References in corpus (4)

• Dephasing in Metals by Two-Level Systems in the 2-Channel-Kondo Regime
• Low-Temperature Dephasing in Disordered Conductors: the Effect of ``1/f'' Fluctuations
• Low-temperature dephasing in disordered conductors: experimental aspects
• Interaction and Quantum Decoherence in Disordered Conductors

Cited by in corpus (27)

• Dephasing of Electrons in Mesoscopic Metal Wires
• Dephasing by extremely dilute magnetic impurities revealed by Aharonov-Bohm oscillations
• Influence of dephasing on shot noise in an electronic Mach-Zehnder interferometer
• Inelastic Scattering Time for Conductance Fluctuations
• Effects of dephasing on shot-noise in an electronic Mach-Zehnder interferometer
• Electronic conduction in multi-walled carbon nanotubes: Role of intershell coupling and incommensurability
• Hydrodynamic effects in interacting Fermi electron jets
• Anomalous temperature dependence of the dephasing time in mesoscopic Kondo wires
• One-dimensional Weak Localization of Electrons in a Single InAs Nanowire
• Probe-Configuration-Dependent Decoherence in an Aharonov-Bohm Ring
• Ground State Energy Fluctuations of a System Coupled to a Bath
• Quantum decoherence of interacting electrons in arrays of quantum dots and diffusive conductors
• Effect of Disorder on the Quantum Coherence in Mesoscopic Wires
• Observation of strong electron dephasing in disordered Cu${}_{93}$Ge${}_4$Au${}_3$ thin films
• Microwave-Induced Dephasing in One-Dimensional Metal Wires
• Effect of annealing on electron dephasing in three-dimensional polycrystalline metals
• Dephasing in strongly anisotropic black phosphorus
• Electron dephasing near zero temperature: an experimental review
• Dephasing Time in a Two-Dimensional Electron Fermi Liquid
• Kondo Effect on Mesoscopic Scale (Review)
• Low-temperature electron dephasing time in AuPd revisited
• Role of surface anisotropy for magnetic impurities in electron dephasing and energy relaxation and their size effect
• Frequency-dependence of the Nyquist noise contribution to the dephasing rate in disordered conductors
• Low temperature dephasing saturation from elastic magnetic spin disorder and interactions
• Non-Markovian dephasing of disordered, quasi-one-dimensional fermion systems
• Saturation of dephasing time in mesoscopic devices produced by a ferromagnetic state
• Energy relaxation due to magnetic impurities in mesoscopic wires: Logarithmic approach