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Calculation of the Raman Linewidths of Lattice Modes Close to the α-β Transition in Quartz
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Mustafa Cem Lider
Published/Copyright:
December 13, 2012
Abstract
The Raman frequencies of the lattice modes (147 cm−1 and 207 cm−1) are analyzed for the α-β 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.
The damping constant of the lattice modes studied here is calculated using the Raman frequencies at various temperatures for the α-β transition in quartz (Tc = 846 K) using the soft mode – hard mode and the energy fluctuation models. Our calculations for the damping constant (bandwidths) give an evidence that the lattice mode of the 147 cm−1 exhibits a soft mode behavior for the α-β transition in quartz.
Received: 2011-10-14
Accepted: 2011-10-31
Published Online: 2012-12-13
Published in Print: 2012-12-14
©[2012] by Walter de Gruyter Berlin Boston
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- Hard Finish Turning Parameters Optimization for Machining of High Temperature Stainless Steel
- High Cycle Fatigue and Cyclic Plastic Deformation Behaviour of High Temperature Oxidation Resistant Titanium Aluminide Coated IMI 834 Alloy at 873 K
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- A Simple Method for Synthesis of PbS Nanoparticles Using 2-Mercaptoethanol as the Capping Agent
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