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The Surface or Interface Polaron in Polar Crystals. III. The Phase‐Transition‐Like Transition for the Surface Polaron
Author(s) -
Jinsheng Pan
Publication year - 1985
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.2221280232
Subject(s) - polaron , condensed matter physics , phase transition , polar , surface (topology) , coupling (piping) , ground state , phase (matter) , electron , physics , materials science , quantum mechanics , mathematics , geometry , metallurgy
Abstract The behaviour of the surface polarons in polar crystals is taken into account by making use of the Bogolyubov inequality. The results show that the ground state energy, effective mass, and the effective potential energy of the surface polarons are dependent on the temperature. For the strong coupling surface polaron, when the temperature approaches a certain critical value T 0 , there exists a phase transition from the polaron to the free electron; but for the weak coupling case, such a phase transition does not exist.