Publication

Photoluminescence spectra in semiconductor confined systems: Effects of Coulomb correlation

Vincenzo Savona
1998
Conference Papers

Abstract

The interacting electron-hole system is investigated in the framework of non-equilibrium Green's functions. Using the Bethe-Salpeter equation in the ladder approximation we derive a set of equations for the polarization of the interacting electron and hole system. By solving these equations we reproduce the photoluminescence spectrum for a continuous wave excitation. Calculations are performed in the one-dimensional case using a contact potential for electron-hole interaction, which allows to perform most of the steps of the calculations analytically. The main features of the one dimensional Coulomb correlation, namely the exciton blue drift due to phase space filling; and the Sommerfeld factor are reproduced. The dependence of the spectra on the density and energy of the pump is discussed.

Official source

https://infoscience.epfl.ch/entities/publication/15cd33d2-df53-46d3-aba9-0d72322139ef

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Vincenzo Savona
1998
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/15cd33d2-df53-46d3-aba9-0d72322139ef

About this result

Related concepts (32)

Electron

The electron (_Electron or _beta-) is a subatomic particle with a negative one elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron's mass is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ.

Free electron model

In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.

Electron mobility

In solid-state physics, the electron mobility characterises how quickly an electron can move through a metal or semiconductor when pulled by an electric field. There is an analogous quantity for holes, called hole mobility. The term carrier mobility refers in general to both electron and hole mobility. Electron and hole mobility are special cases of electrical mobility of charged particles in a fluid under an applied electric field. When an electric field E is applied across a piece of material, the electrons respond by moving with an average velocity called the drift velocity, .

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Photoluminescence spectra in semiconductor confined systems: Effects of Coulomb correlation

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