Open AccessA NOTE ON THE BIPOLARONIC MODEL
Author(s) -
Hang Zheng
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.1363
Subject(s) - phonon , singlet state , physics , ground state , polaron , condensed matter physics , reduction (mathematics) , range (aeronautics) , state (computer science) , quantum mechanics , electron , materials science , computer science , mathematics , excited state , geometry , algorithm , composite material
Via a reconsideration of a simple model for bipolarons, we have shown that in order to-keep the total energy of the model system to be a stable minimum, a new phonon coherent state should be introduced as a result of the electron-phonon interaction. Thus it could be in-fered that the reduction effect of phonons is much weaker and the range of the singlet bipo-laronic state as the stable ground state configuration is more extensive than what the previous authors considered.