Bandgap Narrowing in Quantum Wires

Details Bandgap Narrowing in Quantum Wires Bandgap Narrowing in Quantum Wires

2005-08-11

arxiv.org/abs/cond-mat/0508279v1

Int. J. Mod. Phys. C, 17(2) (2006) 167-186

Physics

Condensed Matter

Strongly Correlated Electrons

17 Pages, 4 Figures

Scientific paper

10.1142/S0129183106009102

In this paper we consider two different geometry of quasi one-dimensional semiconductors and calculate their exchange-correlation induced bandgap renormalization (BGR) as a function of the electron-hole plasma density and quantum wire width. Based on different fabrication scheme, we define suitable external confinement potential and then leading-order GW dynamical screening approximation is used in the calculation by treating electron-electron Coulomb interaction and electron-optical phonon interaction. Using a numerical scheme, screened Coulomb potential, probability of different states, profile of charge density and the values of the renormalized gap energy are calculated and the effects of variation of confinement potential width and temperature are studied.

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