Quantum Confinement Effects in Dynamically Screened Quasi-One-Dimensional Systems

We theoretically study the quantum confinement effects on the self-energies of electrons and holes in quasi-one-dimensional semiconductor systems. It is found that the effective Coulomb interactions are enhanced with the increase in lateral confinement and the decrease in confinement size. The singl...

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Bibliographic Details
Published inChinese physics letters Vol. 30; no. 6; pp. 67201 - 1-067201-4
Main Authors Wang, Ting-Dong, Huai, Ping
Format Journal Article
LanguageEnglish
Published 01.06.2013
Subjects
Approximation
Confinement
Coulomb friction
Dynamical systems
Dynamics
Mathematical analysis
Quantum confinement
Semiconductors
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Summary:We theoretically study the quantum confinement effects on the self-energies of electrons and holes in quasi-one-dimensional semiconductor systems. It is found that the effective Coulomb interactions are enhanced with the increase in lateral confinement and the decrease in confinement size. The single-particle self-energies of electrons and holes are calculated in dynamic plasmon pole approximation within the GW approximation, where G refers to Green's function and W is the dynamically screened Coulomb interaction. The real and imaginary parts of the self-energies have a strong dependence on the effective Coulomb interactions.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/30/6/067201