| Issue |
Europhys. Lett.
Volume 39, Number 4, August II 1997
|
|
|---|---|---|
| Page(s) | 419 - 424 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00371-6 | |
| Published online | 01 September 2002 | |
Absorption of surface acoustic waves by quantum dots: Discrete spectrum limit
1
Weizmann Institute of Science, Department of Condensed Matter
Physics, Rehovot 76100, Israel
2
School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences,
Tel Aviv University, Tel Aviv 69978, Israel
3
Department of Physics, University of Oslo, P. O. Box 1048, Blindern,
0316 Oslo, Norway
Received:
7
February
1997
Accepted:
3
July
1997
The absorption of surface acoustic waves (SAWs) by an array of
quantum dots in which the mean level spacing
is larger than the sound frequency ω, the temperature T, and
the phase breaking rate 
is considered. The direct and the
intra-level (Debye) contributions to the SAW attenuation coefficient 
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, 
. It is argued that the non-invasive measurement of 
represents a new tool for the investigation of the temperature dependence of the
energy relaxation rate,
, and the phase breaking rate, , of isolated
electronic systems.
PACS: 72.50.+b – Acoustoelectric effects / 73.20.Fz – Weak localization effects (e.g., quantized states)
© EDP Sciences, 1997
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