Vertex corrections in a nearly-free-electron model
- 14 July 1978
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 11 (13) , L515-L519
- https://doi.org/10.1088/0022-3719/11/13/004
Abstract
The first vertex correction to the self-energy makes only a small contribution, about 65 meV, to the band gap in a nearly-free-electron system having the parameters of silicon. The contribution is expected to be larger in a more tightly bound system.Keywords
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