Electron coherence at low temperatures: The role of magnetic impurities

2007/06/04 by Laurent Saminadayar, Pritiraj Mohanty, R. A. Webb +3 · 29 citations
Engineering · Physics and Astronomy · #Coherence (philosophical gambling strategy) #Condensed matter physics #Electron #Impurity #Magnetic impurity #Materials science #Molecular Junctions and Nanostructures #Optics #Phase coherence #Physics #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Saturation (graph theory) #Scattering #Surface and Thin Film Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1016/j.physe.2007.05.026

published in Physica E Low-dimensional Systems and Nanostructures 40(1), 12-24 (Elsevier BV) · review article, 14 pages, 11 figures. Physica E (in press)

openalex publication_date 2007/06/04 · arxiv created 2007/09/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Decoherence in weak localization. I. Pauli principle in influence functional
• Electronic lifetimes in ballistic quantum dots electrostatically coupled to metallic environments
• Theory of inelastic scattering from quantum impurities
• Single-particle path integral for composite fermions and the renormalization of the effective mass
• Disorder-quenched Kondo effect in mesoscopic electronic systems
• Theory of Inelastic Scattering from Magnetic Impurities
• Dephasing due to electron-electron interaction in a diffusive ring
• Spin-Orbit Interaction and Magnetoresistance in the Two Dimensional Random System
• Resistance Minimum in Dilute Magnetic Alloys
• A ?fermi-liquid? description of the Kondo problem at low temperatures

Cited by

• A Mean-Field Lindblad Master Equation Framework for Interaction-Driven Decoherence in Solid-State Qubit Ensembles
• Phase-Coherent Dynamics of Quantum Devices with Local Interactions
• Observation of long phase-coherence length in epitaxial La-doped CdO thin films
• Quantum coherence at low temperatures in mesoscopic systems: Effect of disorder