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Cohesion of Solids under Very High Electronic Excitation Conditions
Author(s) -
Wautelet M.
Publication year - 1986
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.2221380208
Subject(s) - excited state , excitation , cohesion (chemistry) , instability , electron , atomic physics , electron excitation , phonon , materials science , diffraction , electron hole , condensed matter physics , physics , quantum mechanics
When a solid is subject to an intense electronic excitation, it is expected that its cohesive properties differ from the non‐excited state. The variation of crystal instability temperature, T c , with the concentration of excited electron–hole pairs is examined theoretically. Using a phenomenological model of electron–phonon–defect interactions, it is shown that T c decreases quasi‐linearly with increasing electron–hole pair density. The consequences of this on diffraction broadening, threshold energy for transformation, premelting, and optical properties are discussed.