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Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Editor-in-Chief: Holthaus, Martin

Editorial Board: Fetecau, Corina / Kiefer, Claus

12 Issues per year


IMPACT FACTOR 2016: 1.432

CiteScore 2017: 1.30

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Source Normalized Impact per Paper (SNIP) 2017: 0.632

Online
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1865-7109
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Volume 69, Issue 8-9

Issues

Investigations of the Thermal Shifts and Electron–Phonon Coupling Parameters of R1 and R2 Lines for Cr3+-doped Forsterite

Xiao-Xuan Wu
  • Department of Physics, Civil Aviation Flight University of China, Guanghan, People’s Republic of China
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Wen-Chen Zheng
Published Online: 2014-06-02 | DOI: https://doi.org/10.5560/zna.2014-0040

The thermal shifts of R1 and R2 lines in Cr3+-doped forsterite (Mg2SiO4) are studied by considering both the static contribution due to lattice thermal expansion and the vibrational contribution due to electron-phonon interaction. In the studies, the thermal expansion coefficient of the Cr3+ center is assumed reasonably as that of the corresponding cluster in the host crystal. The results suggest that for R1 and R2 lines the static contributions are opposite in sign and in magnitude about 37% and 45%, respectively, of the corresponding vibrational contributions. The true electron-phonon coupling coefficients α' (obtained by considering both contributions) increase by about 58% and 81%, respectively, for R1 and R2 lines in comparison with the corresponding parameters α obtained by considering only the vibrational contribution. It appears that for the reasonable explanation of thermal shift of spectral lines and the exact estimation of electron-phonon coupling coefficient, both the static and vibrational contributions should be taken into account

Keywords: Thermal Shift; Optical Spectrum; Electron-Phonon Coupling; Mg2SiO4; Cr3+

About the article

Received: 2014-03-18

Revised: 2014-05-02

Published Online: 2014-06-02

Published in Print: 2014-09-01


Citation Information: Zeitschrift für Naturforschung A, Volume 69, Issue 8-9, Pages 497–500, ISSN (Online) 1865-7109, ISSN (Print) 0932-0784, DOI: https://doi.org/10.5560/zna.2014-0040.

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