Home
For authors
Submission status

Current
Archive
Archive (English)
   Volumes 41-62
   Volumes 1-20
   Volumes 21-40
      Volume 40
      Volume 39
      Volume 38
      Volume 37
      Volume 36
      Volume 35
      Volume 34
      Volume 33
      Volume 32
      Volume 31
      Volume 30
      Volume 29
      Volume 28
      Volume 27
      Volume 26
      Volume 25
      Volume 24
      Volume 23
      Volume 22
      Volume 21
Search
VOLUME 21 (1975) | ISSUE 2 | PAGE 121
Soft mode at the boundary of the Brillouin zone and nature of the phase transition in monovalent mercury-halide crystals
With Hg2Cl2 and Hg2Br2 as examples, we observed for the first time a soft mode in pure ferroelastics. The soft mode was observed in the Raman scattering spectra (RSS) at temperatures below the point of the D 4h-D 2h structure phase transition. A model of the phase transition is proposed on the basis of an investigation of the singularities of the RSS.