On the many body theory of the energy gap in semiconductors

W. van Haeringen, B. Farid, D. Lenstra

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

11 Citaten (Scopus)


We compare a variety of approximation schemes, all predicting the excitation structure of a semiconductor. All schemes are placed within one common framework, in which the electron self energy is the central quantity. In arriving at this self energy it turns out to be essential to screen the Coulomb interaction between electrons both statically and dynamically. We subsequently discuss the Hartree, Hartree-Fock, local density functional and Slater Xα schemes, which all lead to incorrect excitation structures, and the GW scheme of Hedin which, in view of recent successes, appears to be a very promising scheme.

Originele taal-2Engels
Pagina's (van-tot)282-288
Aantal pagina's7
TijdschriftPhysica Scripta
Nummer van het tijdschriftT19A
StatusGepubliceerd - 1 jan 1987

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