High-pressure Raman study of L-alanine crystal

A. M. R. Teixeira; P. T. C. Freire; A. J. D. Moreno; J. M. Sasaki; A. P. Ayala; J. Mendes Filho; F. E. A. Melo

doi:10.1016/S0038-1098(00)00342-2

High-pressure Raman study of L-alanine crystal

Materials Science 2009-10-31 v1

Authors: A. M. R. Teixeira , P. T. C. Freire , A. J. D. Moreno , J. M. Sasaki , A. P. Ayala , J. Mendes Filho , F. E. A. Melo

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Abstract

Pressure-dependent Raman scattering studies in the range 0.0 -- 32 kbar were carried out in L-alanine in order to investigate its external mode phonon spectra in relation to the phase transitions in the crystal. A careful analysis of the spectra shows that the low-energy Raman modes exhibit variation both in frequency and in intensity and between 26 and 28 kbar it is observed a splitting of a external mode, indicating that the D_2 normal phase undergoes a transition. Pressure coefficients for external modes are also given.

Keywords

Raman scattering high pressure L-alanine phonon spectra phase transition

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@article{arxiv.cond-mat/0001212,
  title  = {High-pressure Raman study of L-alanine crystal},
  author = {A. M. R. Teixeira and P. T. C. Freire and A. J. D. Moreno and J. M. Sasaki and A. P. Ayala and J. Mendes Filho and F. E. A. Melo},
  journal= {arXiv preprint arXiv:cond-mat/0001212},
  year   = {2009}
}

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11 pages, Latex, 2 figures

High-pressure Raman study of L-alanine crystal

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