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|Title:||Photoreflectance study on the surface states of n-type GaN|
|Citation:||Liu, W., Li, M.F., Chua, S.J., Akutsu, N., Matsumoto, K. (1999-05). Photoreflectance study on the surface states of n-type GaN. Semiconductor Science and Technology 14 (5) : 399-402. ScholarBank@NUS Repository. https://doi.org/10.1088/0268-1242/14/5/004|
|Abstract:||Photoreflectance spectroscopy was used to study n-type GaN epilayers with doping concentrations ranging from 3×1017 cm-3 to 5×1018 cm-3. The relative change of reflectance signal |ΔR/R| was investigated as a function of doping concentration ND. The value of log10(|ΔR/R|) was found to be proportional to log10 (ND) with a slope of -1.2±0.2. This result can be explained by a simple model based on an assumption that low-density surface states exist in the surface of GaN. The result may clarify certain issues in the existing Schottky barrier experiments.|
|Source Title:||Semiconductor Science and Technology|
|Appears in Collections:||Staff Publications|
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