Premium
Pressure dependence of optical phonons in ZnCdSe alloys
Author(s) -
Camacho J.,
Loa I.,
Cantarero A.,
Syassen K.,
HernándezCalderón I.,
González L.
Publication year - 2003
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.200301597
Subject(s) - phonon , hydrostatic pressure , ternary operation , alloy , condensed matter physics , raman spectroscopy , materials science , raman scattering , hydrostatic equilibrium , transverse plane , ternary alloy , epitaxy , molecular vibration , optics , physics , nanotechnology , thermodynamics , composite material , structural engineering , engineering , quantum mechanics , layer (electronics) , computer science , programming language
We report on resonant Raman scattering measurements under hydrostatic pressure and at low temperature on two Zn x Cd 1– x Se alloy films, which were grown by different epitaxial techniques on GaAs. This ternary alloy exhibits an intermediate (I) mode between the typical transverse (TO) and longitudinal optical (LO) modes of the zinc‐blende structure. The shift of the vibrational frequencies of the three modes with pressure is analyzed. The Grüneisen parameters of these three optical modes are determined. Moreover, overtones of the LO modes as well as TO + n LO and I + n LO zone‐center phonon combinations are observed.