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Existence of Two‐Phonon Bound States in Deuterated Naphthalene
Author(s) -
Bhandari R.,
Jindal V. K.
Publication year - 1991
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.2221670108
Subject(s) - anharmonicity , phonon , quartic function , naphthalene , deuterium , force constant , condensed matter physics , bound state , crystal (programming language) , physics , quantum mechanics , function (biology) , chemistry , mathematics , molecule , organic chemistry , evolutionary biology , computer science , pure mathematics , biology , programming language
A numerical calculation is performed to search for the existence of two‐phonon bound states in deuterated naphthalene crystals. The quartic anharmonic force constant needed for the calculation of the poles in the two‐phonon Green's function is approximated by using Peierls approximation and already calculated results of the explicit anharmonic shifts to the phonon frequencies. The results indicate that the existence of two‐phonon bound states is possible in a deuterated naphthalene crystal at various temperatures.