Electron coherence at low temperatures:: The role of magnetic impurities

被引：24

作者：

Saminadayar, Laurent

Mohanty, Pritiraj

Webb, Richard A.

Degiovanni, Pascal

Bauerle, Christopher

机构：

[1] Univ Grenoble 1, CNRS, Inst Neel, F-38042 Grenoble, France

[2] Boston Univ, Dept Phys, Boston, MA 02215 USA

[3] Univ S Carolina, USC Nano Ctr, Columbia, SC 29208 USA

[4] Ecole Normale Super Lyon, Phys Lab, F-69364 Lyon, France

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2007年 / 40卷 / 01期

基金：

美国国家科学基金会;

关键词：

weak localization; decoherence; electron-electron interactions; disorder; OF-FLIGHT EXPERIMENT; WEAK-LOCALIZATION; INTRINSIC DECOHERENCE; QUANTUM DECOHERENCE; SCATTERING; BEHAVIOR; FILMS; GOLD; AU;

D O I：

10.1016/j.physe.2007.05.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 tau(phi) 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. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：12 / 24

页数：13

共 71 条

[1]

ABRAHAM D, 1983, PHYS REV B, V27, P33

[2]

AKKERMANS E, 2004, PHYS MESOSCOPIQUE EL

[3]

Altshuler B.L., 1985, Electron-electron Interactions in Disordered System

[4] EFFECTS OF ELECTRON-ELECTRON COLLISIONS WITH SMALL ENERGY TRANSFERS ON QUANTUM LOCALIZATION [J].