In this paper we show that, under resonance condition, the pressure coefficient of the n -th order longitudinal optical (LO) phonon determined by Raman scattering at low temperature exhibits a linear dependence on n. This linear dependence arises from a quadratic dependence of the LO phonon pressure coefficient on the phonon wave vector. The results of the theoretical calculation are in qualitative agreement with recently reported experimental results in CdS [I. H. Choi and P. Y. Yu, phys. stat. sol. (b) 242, 2813 (2005)]. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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Volume243, Issue12

October 2006

Pages 2693-2701

Wave vector dependence of the pressure coefficient of the longitudinal optical phonon in CdS

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Wave vector dependence of the pressure coefficient of the longitudinal optical phonon in CdS

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