Absorption of surface acoustic waves by quantum dots: Discrete spectrum limit

A. Knäbchen*, O. Entin-Wohlman, Y. Galperin, Y. Levinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The absorption of surface acoustic waves (SAWs) by an array of quantum dots in which the mean level spacing Δ is larger than the sound frequency ω, the temperature T, and the phase breaking rate τ-1φ is considered. The direct and the intra-level (Debye) contributions to the SAW attenuation coefficient Γ are evaluated, and it is shown that the sensitivity to weak magnetic fields and spin-orbit scattering ("weak localization effects") is dramatically enhanced as compared to the case of a continuous spectrum, Δ < τ-1φ. It is argued that the non-invasive measurement of Γ represents a new tool for the investigation of the temperature dependence of the energy relaxation rate, τ-1, and the phase breaking rate, τ-1φ, of isolated electronic systems.

Original languageEnglish
Pages (from-to)419-424
Number of pages6
JournalEurophysics Letters
Issue number4
StatePublished - 15 Aug 1997


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