Phonon-mediated relaxtion in doped quantum dot molecules

Anna Grodecka-Grad; Jens Förstner

doi:10.1088/1742-6596/245/1/012035

Phonon-mediated relaxtion in doped quantum dot molecules

Anna Grodecka-Grad, Jens Förstner

Abstract

We study a single quantum dot molecule doped with one electron in the presence of electron-phonon coupling. Both diagonal and off-diagonal interactions representing real and virtual processes with acoustic phonons via deformation potential and piezoelectric coupling are taken into account. We employ a non-perturbative quantum kinetic theory and show that the phonon-mediated relaxation is dominated by an electron tunneling on a picosecond time scale. A dependence of the relaxation on the temperature and the strength of the tunneling coupling is analyzed.

Original language	English
Book series	Journal of Physics - Conference Series
Volume	245
Issue number	1
Pages (from-to)	012035
ISSN	1742-6588
DOIs	https://doi.org/10.1088/1742-6596/245/1/012035
Publication status	Published - 1 Jan 2010
Event	Quantum dots - Nottingham, United Kingdom Duration: 26 Apr 2010 → 30 Apr 2010 Conference number: 245

Conference

Conference	Quantum dots
Number	245
Country/Territory	United Kingdom
City	Nottingham
Period	26/04/2010 → 30/04/2010

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10.1088/1742-6596/245/1/012035

http://iopscience.iop.org/1742-6596/245/1/012035/

Cite this

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title = "Phonon-mediated relaxtion in doped quantum dot molecules",

abstract = "We study a single quantum dot molecule doped with one electron in the presence of electron-phonon coupling. Both diagonal and off-diagonal interactions representing real and virtual processes with acoustic phonons via deformation potential and piezoelectric coupling are taken into account. We employ a non-perturbative quantum kinetic theory and show that the phonon-mediated relaxation is dominated by an electron tunneling on a picosecond time scale. A dependence of the relaxation on the temperature and the strength of the tunneling coupling is analyzed.",

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N2 - We study a single quantum dot molecule doped with one electron in the presence of electron-phonon coupling. Both diagonal and off-diagonal interactions representing real and virtual processes with acoustic phonons via deformation potential and piezoelectric coupling are taken into account. We employ a non-perturbative quantum kinetic theory and show that the phonon-mediated relaxation is dominated by an electron tunneling on a picosecond time scale. A dependence of the relaxation on the temperature and the strength of the tunneling coupling is analyzed.

AB - We study a single quantum dot molecule doped with one electron in the presence of electron-phonon coupling. Both diagonal and off-diagonal interactions representing real and virtual processes with acoustic phonons via deformation potential and piezoelectric coupling are taken into account. We employ a non-perturbative quantum kinetic theory and show that the phonon-mediated relaxation is dominated by an electron tunneling on a picosecond time scale. A dependence of the relaxation on the temperature and the strength of the tunneling coupling is analyzed.

U2 - 10.1088/1742-6596/245/1/012035

DO - 10.1088/1742-6596/245/1/012035

M3 - Conference article

SN - 1742-6588

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SP - 012035

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

T2 - Quantum dots

Y2 - 26 April 2010 through 30 April 2010

ER -

Phonon-mediated relaxtion in doped quantum dot molecules

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