| Author/Editor | Muševič, I; Žekš, B; Blinc, R; Wierenga, HA; Rasing, Th | |
| Title | Phason dispersion and magnetic-field-induced band gap in a ferroelectric liquid crystal | |
| Type | članek | |
| Source | Phys Rev Lett | |
| Vol. and No. | Letnik 68, št. 12 | |
| Publication year | 1992 | |
| Volume | str. 1850-53 | |
| Language | eng | |
| Abstract | The phason dispersion and the dielectric response of a ferroelectric Sm-C* liquid cryslal in an external magnetic field have been measured. A magnetic-field-induced splitting of the phason branch into an acousticlike and an opticlike mode was observed, indicating a crossover between the plane-wave-like and solitonlike phason dynamics. The resulting band gap at q = 0 is a direct consequence of the broken continuous helicoidal symmetry of the Sm-C* phase in a transverse magnetic field. | |
| Descriptors | MAGNETICS CRYSTALLOGRAPHY |