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, cilt.31, sa.6, ss.741-747, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 6
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1515/htmp-2012-0004
  • Dergi Adı: HIGH TEMPERATURE MATERIALS AND PROCESSES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.741-747
  • Anahtar Kelimeler: Raman linewidths, lattice modes, alpha-beta transition, quartz, PHASE-TRANSITION, INTERMEDIATE PHASE, TEMPERATURE-DEPENDENCE, SATELLITE REFLECTIONS, DAMPING CONSTANT, SCATTERING, CRYSTALS, BEHAVIOR, PHONONS, ORDER
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.