Low Temperature Physics: 37, 197 (2011); https://doi.org/10.1063/1.3573604 (5 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 3 (March 2011), p. 251-257    ( to contents , go back )

Acoustic conversion of quantum states in semiconductors

N.S. Averkiev1, I.V. Rozhansky1, S.A. Tarasenko1, and M.B. Lifshits1,2

1A.F. Ioffe Physical Technical Institute of the RAS, 26 Politekhnicheskaya, St. Petersburg 194021, Russia
E-mail: averkiev@les.ioffe.ru

2Universite Montpellier II, Montpellier, CEDEX 5, France
pos Анотація:

Received October 13, 2010


The interaction between solitary strain pulse (acoustic soliton) and localized holes in silicon-based nanostructures is studied theoretically. It is shown that the acoustic soliton propagating through the hole localization area changes the hole state to that with a different projection of angular momentum. The microscopic mechanism of the effect is related to the valence band splitting by local elastic strain. We have studied such a state conversion for holes in a quantum dot or localized at acceptors in a quantum well. It is shown that the strain amplitude required for the complete switching of the hole state corresponds to strain pulses studied experimentally.

PACS: 78.20.hb Piezo-optical, elasto-optical, acousto-optical, and photoelastic effects;
PACS: 63.20.K– Phonon interactions;
PACS: 78.67.De Quantum wells.

Key words: acoustic soliton, quantum dots, quantum wells.

Download 364872 byte View Contents