title: Explanation of the glasslike anomaly in the low-temperature specific heat of incommensurate phases.
abstract: An explanation of the glasslike anomaly observed in the low-temperature specific heat of incommensurate phases is proposed. The key point of this explanation is to properly account for the phason damping when computing the thermodynamic magnitudes. The low-temperature specific heat of the incommensurate phases is discussed within three possible scenarios for the phason dynamics: no phason gap, static phason gap, and a phason gap of dynamical origin. Existing NMR and inelastic scattering data indicate that these scenarios are possible in biphenyl, blue bronze K(0.30)MoO(3), and bis (4-chlorophenyl) sulfone respectively. Estimates of the corresponding low-temperature specific heat are in reasonable agreement with the experiments.
authors.affiliation: Departamento de Física de la Materia Condensada C-III, Universidad Autónoma de Madrid, E-28049 Madrid, Spain. andres.cano@uam.es
authors.forename: A
authors.initials: A
authors.lastname: Cano
authors.forename: A P
authors.initials: AP
authors.lastname: Levanyuk