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Application of the Density-Functional Formalism to Bound Polarons

✍ Scribed by J. Röseler

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
544 KB
Volume
130
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

Calculating the ground state energy of the bound polaron with the help of the density‐functional formalism high quality results are found for all α and R. Beside the usual energy functional of the electronic density a new energy functional without self‐energy contributions can be constructed, allowing to prove quantitatively the applicability of the local density approximation if electron–phonon interaction is included. Furthermore, the validity of the parametrized formula for the exchange‐correlation energy of a homogeneous e–h plasma in polar semiconductors is confirmed by the calculations. Comparing both energy functionals new insights are obtained with respect to the structure of these functionals.

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