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Wave vector dependence of the pressure coefficient of the longitudinal optical phonon in CdS
Author(s) -
Yu Peter Y.,
Choi InHwan
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200541507
Subject(s) - phonon , condensed matter physics , wave vector , raman scattering , quadratic equation , pressure coefficient , raman spectroscopy , physics , attenuation coefficient , order (exchange) , phonon scattering , chemistry , quantum mechanics , thermodynamics , mathematics , finance , economics , geometry
Abstract 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)