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Title: Self-energy of an electron due to electron-phonon interaction in alkali metals : Its dependence on phonon dispersion relation and realistic electron-electron screening
Authors: Tewari, S P
Kapoor, Charu
Issue Date: Oct-1999
Publisher: NISCAIR-CSIR, India
Abstract: The electron mass-enhancement factor, λ, due to electron-phonon interaction, has been evaluated considering realistic description , both for electrons and phonons. Explicit analytical expressions for λ have been derived for dispersionless, highly dispersive and intermediately dispersive phonons when the electron screening is given by Thomas-Fermi model. Different types of electron screening which incorporate electron-electron interaction much beyond Thomas-Fermi have also been considered. Computation of λ for all alkali metals have been made and compared with the corresponding experimental and other theoretical results.
Page(s): 764-773
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.37(10) [October 1999]

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