DIRECT OBSERVATION OF A PHASON GAP IN AN INCOMMENSURATE MOLECULAR-COMPOUND

Authors
OLLIVIER J ETRILLARD J TOUDIC B ECOLIVET C BOURGES P LEVANYUK AP
Citation
J. Ollivier et al., DIRECT OBSERVATION OF A PHASON GAP IN AN INCOMMENSURATE MOLECULAR-COMPOUND, Physical review letters, 81(17), 1998, pp. 3667-3670
Citations number
27
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
17
Year of publication
1998
Pages
3667 - 3670
Database
ISI
SICI code
0031-9007(1998)81:17<3667:DOOAPG>2.0.ZU;2-X
Abstract
We report the results of an inelastic neutron scattering study of the lattice vibration spectra in the normal and incommensurate phases of ( ClC6D4)(2)SO2. Because of unusually low soft mode damping, a finite va lue of the phason frequency at the satellite position is observed for the first time. The soft mode frequency saturation in the normal phase and this phason gap are consistent with the dynamical nature of the o bserved central peak. [S0031-9007(98)07373-6].