TEMPERATURE DEPENDENCE OF THE RAMAN FREQUENCIES IN THE gamma AND beta PHASES OF SOLID NITROGEN

Date

2010-12-20

Author

Yurtseven, Hasan Hamit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

184
views

0
downloads

We study here the Raman frequencies of the lattice modes (gamma and beta phases) and of an internal mode (gamma phase) as a function of temperature in solid nitrogen. The frequency shift, derived from the anharmonic self energy, is fitted to the experimental data for the Raman frequencies of the modes considered here in the gamma and beta phases of solid nitrogen.

Subject Keywords

Statistical and Nonlinear Physics, Condensed Matter Physics

URI

https://hdl.handle.net/11511/49248

Journal

INTERNATIONAL JOURNAL OF MODERN PHYSICS B

DOI

https://doi.org/10.1142/s0217979210057614

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Concentration dependence of polarization for the AC* phase transition in a binary mixture of liquid crystals Salihoglu, S; Yurtseven, Hasan Hamit; Bumin, B (World Scientific Pub Co Pte Lt, 1998-08-01) Using mean-field theory with p(2)theta(2) coupling term in the free energy expansion, we calculate the polarization as a function of concentration for the AC* phase transition in a binary mixture of C7 and 10.O.4 liquid crystalline material. Our calculated values of polarization are in good agreement with the experimental data.
TILT ANGLE AND THE TEMPERATURE SHIFTS CALCULATED AS A FUNCTION OF CONCENTRATION FOR THE AC* PHASE TRANSITION IN A BINARY MIXTURE OF LIQUID CRYSTALS Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2011-05-20) We study here the tilt angle and the temperature shifts as a function of concentration for the AC* phase transition in a binary mixture, using our mean field model with the biquadratic P-2 theta(2) coupling - and also with the bilinear P theta and P-2 theta(2) couplings. By expanding the free energy in terms of the tilt angle and polarization, the tilt angle and the temperature shift, are evaluated by using the coefficients given in the free energy expansion. By employing a concentration-dependent coefficie...
TEMPERATURE DEPENDENCE OF THE DAMPING CONSTANT CLOSE TO THE I-II PHASE TRANSITION IN s-TRIAZINE Kavruk, D.; Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2010-01-30) The damping constant is calculated here at various temperatures for the Raman mode II in s-triazine using the soft mode-hard mode coupling model. The temperature dependence of the order parameter is used as the input data to calculate the damping constant of the Raman mode studied in this coupling model for s-triazine close to the I-II transition (T-c = 198 K). The soft mode-hard mode coupling model which considers the coupling of the soft acoustic mode with the optic modes in s-triazine, is fitted to the o...
CALCULATION OF THE RAMAN FREQUENCIES AT LOW PRESSURES AND TEMPERATURES (sigma-PHASE) SOLID NITROGEN Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2013-09-20) We calculate the Raman frequencies of the E-g mode and, the low and high frequency T-g mode as a function of temperature at a constant pressure of 2.85 kbar in the alpha-phase of solid nitrogen. The Raman frequencies of those lattice modes are calculated using the volume data from the literature at various temperatures (2.85 kbar) for the alpha-phase of solid N-2 through the mode Gruneisen parameter. Our predicted Raman frequencies can be compared with the experimental data and by this method the Raman freq...
RAMAN STUDY OF BENZENE NEAR THE MELTING POINT Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2013-06-10) We calculate here the Raman frequencies of some lattice modes as a function of pressure at constant temperatures for the solid and liquid phases of benzene. The observed data for the molar volume from literature is used to calculate the Raman frequencies through the mode Gruneisen parameter in benzene.

Citation Formats

H. H. Yurtseven, “TEMPERATURE DEPENDENCE OF THE RAMAN FREQUENCIES IN THE gamma AND beta PHASES OF SOLID NITROGEN,” INTERNATIONAL JOURNAL OF MODERN PHYSICS B, pp. 6069–6078, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/49248.