Phonon signatures of spontaneous CuPt ordering in Ga{sub 0.47}In{sub 0.53}As/InP
- National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)
Polarized Raman scattering spectra of spontaneously ordered Ga{sub 0.47}In{sub 0.53}As alloys, combined with low-temperature photoluminescence and transmission electron microscopy, are used to find a unique phonon signature of CuPt{sub B}-type ordering. In the Raman spectra of ordered alloys, a new phonon peak that is absent in the spectrum of the random alloy appears at 181 cm{sup {minus}1}. The intensity of this peak correlates with the degree of ordering inferred from electron diffraction measurements. We propose that Raman scattering measurements can be used as a nondestructive probe to detect spontaneous ordering in this alloy. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 663669
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 73; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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