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Raman Scattering of InAs1-x-ySbxPy Quaternary Alloys

The Raman scattering of InAs1-x-ySbxPy quaternary alloys grown on (100)InAs substrates by liquid-phase epitaxy is studied in this work. The peaks at 182, 216, 234 and 312 cm-1 in the Raman spectra are assigned as the InSb LO, InAs TO, InAs 1LO and InP LO modes, respectively. The mode of 476 cm-1 is assigned as the second-order Raman mode, InAs 2LO Raman mode. Also, both the 228- and 303-cm-1 lines are attributed to the disorder-activated optical phonons. In addition, the Raman scattering spectra in InAs1-x-ySbxPy quaternary alloys exhibit a three-mode behavior.