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Low‐Temperature Structure and Lattice Dynamics of 4,4′,‐Difluorobiphenyl
Author(s) -
Wąsicki J.,
Belushkin A. V.,
Khomenko V. G.,
Natkaniec I.,
Telezhenko Yu. V.,
Wasiutyński T.
Publication year - 1988
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.2221450210
Subject(s) - phonon , condensed matter physics , brillouin zone , isostructural , neutron diffraction , monocrystalline silicon , dispersion relation , phase transition , diffraction , inelastic neutron scattering , materials science , dispersion (optics) , inelastic scattering , crystal structure , scattering , chemistry , physics , crystallography , optics , silicon , metallurgy
Phonon frequencies in the centre of the Brillouin zone, dispersion relations, and phonon density of states are calculated for 4,4′‐difluorobiphenyl, following structure investigations by means of X‐ray diffraction on a monocrystalline sample at 110 K. The resulting phonon density of states, weighted with the amplitudes of hydrogen atom vibrations are compared with that obtained from the inelastic incoherent neutron scattering (IINS) data. From the calculated dispersion relations it can be inferred that the incommensurate phase transition (well established in isostructural biphenyl) does not occur in 4,4′‐difluorobiphenyl.