Translation-rotation coupling, phase transitions, and elastic phenomena in orientationally disordered crystals

Disorder effects on heat transport properties of orientationally disordered crystals

The thermal conductivity T of the orientational glass state of 1,2-difluoro-1,1,2,2-tetrachloroethane CFCl2-CFCl2, Freon 112 and cyanocyclohexane C6H11CN has been measured under equilibrium pressure within the temperature range 2–100 K. The results show that the soft-potential model is able to account for low-temperature data and, indeed, quantitative agreement of all data considered is found w...

v 1 4 J ul 1 99 6 Continuous elastic phase transitions in pure and disordered crystals

We review the theory of second–order (ferro–)elastic phase transitions, where the order parameter consists of a certain linear combination of strain tensor components, and the accompanying soft mode is an acoustic phonon. In three– dimensional crystals, the softening can occur in one– or two–dimensional soft sectors. The ensuing anisotropy reduces the effect of fluctuations, rendering the criti...

Phase Transitions and Collective Phenomena

Phase transitions in liquid crystals

Phase Coherence Phenomena in Disordered Superconductors

Mechanisms of quantum phase coherence heavily influence spectral and transport properties of weakly disordered normal conductors. Such effects are manifest in weak and strong localization effects, and characteristic fluctuation phenomena. Over the past thirty years, theoretical progress in elucidating the mechanisms of quantum phase coherence in weakly disordered structures has been substantial...