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Electron Relaxation by LO Phonons in Quantum Wires
Author(s) -
Ammann C.,
Dupertuis M. A.,
Bockelmann U.,
Deveaud B.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199711)204:1<265::aid-pssb265>3.0.co;2-r
Subject(s) - excited state , thermalisation , relaxation (psychology) , phonon , condensed matter physics , adiabatic process , electron , physics , adiabatic theorem , quantum , population , atomic physics , quantum mechanics , psychology , social psychology , demography , sociology
The adiabatic approximation is used to describe the electron states of weakly‐one‐dimensional quantum wires. A clear order is evidenced in the longitudinal optical (LO) phonon mediated transition rates with respect to the quantum numbers of the confined states involved. The average single electron relaxation time from an excited level is shown either to increase or, surprisingly, to decrease as a function of the initial energy. The relaxation of an excited population is dynamically simulated, showing the wire size dependent accelerating and energy lowering effects of an additional phenomenological intrasubband thermalization.