期刊
APPLIED PHYSICS LETTERS
卷 78, 期 25, 页码 3959-3961出版社
AMER INST PHYSICS
DOI: 10.1063/1.1380244
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Raman measurements in backscattering configuration are employed to characterize the effect of nitrogen on the structural properties of a GaNxP1-x alloy with x less than or equal to3 %. The following effects of N incorporation on the vibrational spectra of GaNP are observed. First, frequencies of GaP-like and GaN-like longitudinal optical phonons exhibit strong compositional dependence, due to a combined effect of alloying and biaxial strain. Second, a dramatic quenching of two-phonon Raman scattering and an emergence of zone-edge GaP-like vibrations are observed. These effects are tentatively attributed to a local distortion of the GaNP lattice and/or compositional disorder in the alloy. (C) 2001 American Institute of Physics.
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