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On the correlation effects in the Landau‐Pekar polaron method
Author(s) -
Sikivie P.,
Kartheuser E.,
Evrard R.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220440239
Subject(s) - polaron , physics , formalism (music) , condensed matter physics , ground state , phonon , polarization (electrochemistry) , quantum mechanics , quantum electrodynamics , landau quantization , electron , angular momentum , chemistry , art , musical , visual arts
The conservation of total angular momentum is considered in detail for polarons, using an expansion of the polarization field into spherical waves. This formalism is used to improve the Landau‐Pekar approximation, taking the electron‐phonon correlations partially into account. A value 10 to 20% lower is obtained for the polaron ground state energy for values of the coupling constant α ranging from 8 to 5.