Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Raman scattering in InAsxSbyP1-x-y alloys grown by gas source MBE.
AU - Cheetham, K. J.
AU - Krier, A.
AU - Patel, I. I.
AU - Martin, F. L.
AU - Tzeng, J-S
AU - Wu, C-J
AU - Lin, H-H
AU - EPSRC Studentship for KJC (Funder)
PY - 2011/3/2
Y1 - 2011/3/2
N2 - The Raman spectra of quaternary InAsxSbyP1-x-y epitaxial layers nominally lattice-matched to (1 0 0) n-type InAs substrates are reported. The phonon peaks are identified for alloys covering a wide composition range extending into the miscibility gap. Three-mode behaviour was obtained across part of the composition range. InP-like longitudinal optical (LO) and transverse optical (TO) phonons were observed over the entire compositional range, but InAs-like LO phonons were only observed at high arsenic concentrations and no InSb-like TO phonons were observed. Disorder-related phonon peaks were obtained for alloy compositions within the miscibility gap.
AB - The Raman spectra of quaternary InAsxSbyP1-x-y epitaxial layers nominally lattice-matched to (1 0 0) n-type InAs substrates are reported. The phonon peaks are identified for alloys covering a wide composition range extending into the miscibility gap. Three-mode behaviour was obtained across part of the composition range. InP-like longitudinal optical (LO) and transverse optical (TO) phonons were observed over the entire compositional range, but InAs-like LO phonons were only observed at high arsenic concentrations and no InSb-like TO phonons were observed. Disorder-related phonon peaks were obtained for alloy compositions within the miscibility gap.
U2 - 10.1088/0022-3727/44/8/085405
DO - 10.1088/0022-3727/44/8/085405
M3 - Journal article
VL - 44
SP - 085405
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
SN - 0022-3727
IS - 8
ER -