Measurement of the electronic dephasing time via the weak localization effect in a narrow channel

✍ Scribed by J.A. Katine; M.J. Berry; R.M. Westervelt; A.C. Gossard

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 165 KB
• Volume: 16
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1994.1142

✦ Synopsis

We have utilized the the weak localization effect in a narrow channel to measure the phase coherence time (\left(\tau_{\phi}\right)) at temperatures between (0.42 \mathrm{~K}) and (4.25 \mathrm{~K}) for electrons in a two-dimensional electron gas formed in a (\mathrm{GaAs} / \mathrm{Al}{\mathrm{x}} \mathrm{Ga}{1-\mathrm{x}} \mathrm{As}) heterostructure. The measured values agree well with electron-electron scattering theory in a one-dimensional channel including both single particle and collective contributions.