We investigate charge relaxation rates due to acoustic phonons in weakly confined quantum dot systems, including both deformation potential and piezoelectric field interactions. Single-electron excited states lifetimes are calculated for single and coupled quantum dot structures, both in homonuclear and heteronuclear devices. Piezoelectric field scattering is shown to be the dominant relaxation mechanism in many experimentally relevant situations. On the other hand, we show that appropriate structure design allows to minimize separately deformation potential and piezolectric field interactions, and may bring electron lifetimes in the range of microseconds.

Phonon-induced electron relaxation in weakly confined single and coupled quantum dots / Climente, Ji; Bertoni, A; Goldoni, Guido; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 74:3(2006), pp. 1-7. [10.1103/PhysRevB.74.035313]

Phonon-induced electron relaxation in weakly confined single and coupled quantum dots

GOLDONI, Guido;MOLINARI, Elisa
2006

Abstract

We investigate charge relaxation rates due to acoustic phonons in weakly confined quantum dot systems, including both deformation potential and piezoelectric field interactions. Single-electron excited states lifetimes are calculated for single and coupled quantum dot structures, both in homonuclear and heteronuclear devices. Piezoelectric field scattering is shown to be the dominant relaxation mechanism in many experimentally relevant situations. On the other hand, we show that appropriate structure design allows to minimize separately deformation potential and piezolectric field interactions, and may bring electron lifetimes in the range of microseconds.
2006
74
3
1
7
Phonon-induced electron relaxation in weakly confined single and coupled quantum dots / Climente, Ji; Bertoni, A; Goldoni, Guido; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 74:3(2006), pp. 1-7. [10.1103/PhysRevB.74.035313]
Climente, Ji; Bertoni, A; Goldoni, Guido; Molinari, Elisa
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/2522
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