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Raman Spectra of InAs 1−x Sb x Alloys and InAs 0.58 Sb 0.42 /InSb Strained Layer Superlattice under High Pressure
Author(s) -
Nagata K.,
Webb S. J.,
Stradling R. A.
Publication year - 1996
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.2221980170
Subject(s) - superlattice , hydrostatic pressure , raman scattering , raman spectroscopy , materials science , condensed matter physics , phase transition , phase (matter) , layer (electronics) , chemistry , optoelectronics , optics , nanotechnology , thermodynamics , physics , organic chemistry
Raman scattering has been measured in InAs 1−x Sb x alloys (0 ⩽ × ⩽ 1) and an InAs 0.58 Sb 0.42 /InSb strained layer superlattice under hydrostatic pressures up to the phase transition. The pressure coefficient of the Raman frequency (δω/δ p ) of the InAs‐like LO mode in InAs 1−x Sb x alloys increases with increasing composition ×, while that of the InSb‐like LO mode is almost constant above × = 0.5. The phase transition pressure of InAs 1−x Sb x alloys decreases almost linearly with composition. On the other hand, both component layers of an InAs 0.58 Sb 0.42 /InSb superlattice change phase simultaneously at a pressure which is the mean of the phase transition pressures for bulk InAs 0.58 Sb 0.42 and InSb.