Calculation of the Raman Linewidths of Lattice Modes Close to the alpha-beta Transition in Quartz


Lider M. C. , YURTSEVEN H. H.

HIGH TEMPERATURE MATERIALS AND PROCESSES, vol.31, no.6, pp.741-747, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 6
  • Publication Date: 2012
  • Doi Number: 10.1515/htmp-2012-0004
  • Title of Journal : HIGH TEMPERATURE MATERIALS AND PROCESSES
  • Page Numbers: pp.741-747
  • Keywords: Raman linewidths, lattice modes, alpha-beta transition, quartz, PHASE-TRANSITION, INTERMEDIATE PHASE, TEMPERATURE-DEPENDENCE, SATELLITE REFLECTIONS, DAMPING CONSTANT, SCATTERING, CRYSTALS, BEHAVIOR, PHONONS, ORDER

Abstract

The Raman frequencies of the lattice modes (147 cm(-1) and 207 cm(-1)) are analyzed for the alpha-beta transition in quartz according to a power-law formula with the critical exponent by using the experimental data. The temperature dependence of the Raman frequency is associated with the order parameter (polarization P) for this transition in the quartz crystal.