Properties of optical phonons in cubic In[sub x]Ga[sub 1-x]N

Torii, K.; Usukura, N.; Nakamura, A.; Sota, T.; Chichibu, S. F.; Kitamura, T.; Okumura, H.
January 2003
Applied Physics Letters;1/6/2003, Vol. 82 Issue 1, p52
Academic Journal
Infrared reflectance spectroscopy was carried out to study the properties of zone center optical phonons in ternary cubic In[sub x]Ga[sub 1 - x]N free from phase separation. Raman spectra were also measured as auxiliary measures. Optical phonon behavior was confirmed to be type I. It is demonstrated that the behavior arises from both the small mass ratio of Ga to In atoms and the rather strong ionicity of Ga-N and In-N bonds.


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