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On the Bose‐Einstein Condensation of Excitons
Author(s) -
Kotelnikov Yu. E.,
Kochelaev B. I.
Publication year - 1977
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.2220810239
Subject(s) - exciton , bose–einstein condensate , dipole , condensation , physics , condensed matter physics , phase transition , quantum mechanics , thermodynamics
The Bose‐Einstein condensation of Frenkel excitons in molecular crystals is investigated by means of the Green's function method without the use of the effective mass approximation, the kinematic interaction between excitons being taken into account accurately. The spectrum of elementary excitations at low temperatures in the case of dipole–dipole interaction between molecules is obtained. The temperature of the phase transition and its dependence on the concentration of excitons are estimated.