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 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 6
  • Publication Date: 2012
  • Doi Number: 10.1515/htmp-2012-0004
  • Journal Name: HIGH TEMPERATURE MATERIALS AND PROCESSES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • 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
  • Middle East Technical University Affiliated: Yes

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.