TY  - JOUR
AU  - Yang, S.
AU  - Huang, S.
AU  - Chen, H.
AU  - Schnee, M.
AU  - Zhao, Q.T.
AU  - Schubert, J.
AU  - Chen, K.J.
TI  - Characterization of high- LaLuO3 thin film grown on AlGaN/GaN heterostructure by molecular beam deposition
JO  - Applied physics letters
VL  - 99
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-17056
SP  - 182103
PY  - 2011
N1  - This work is supported by Hong Kong Research Grant Council under 611610. The authors also thank Mr. J.J. Gu and Professor P.D. Ye from Purdue University for valuable information about LLO thin film.
AB  - We report the study of high-dielectric-constant (high-kappa) dielectric LaLuO3 (LLO) thin film that is grown on AlGaN/GaN heterostructure by molecular beam deposition (MBD). The physical properties of LLO on AlGaN/GaN heterostrucure have been investigated with atomic force microscopy, x-ray photoelectron spectroscopy, and TEM. It is revealed that the MBD-grown 16 nm-thick LLO film is polycrystalline with a thin (similar to 2 nm) amorphous transition layer at the LLO/GaN interface. The bandgap of LLO is derived as 5.3 +/- 0.04 eV from O1s energy loss spectrum. Capacitance-voltage (C-V) characteristics of a Ni-Au/LLO/III-nitride metal-insulator-semiconductor diode exhibit small frequency dispersion (<2%) and reveal a high effective dielectric constant of similar to 28 for the LLO film. The LLO layer is shown to be effective in suppressing the reverse and forward leakage current in the MIS diode. In particular, the MIS diode forward current is reduced by 7 orders of magnitude at a forward bias of 1V compared to a conventional Ni-Au/III-nitride Schottky diode. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3657521]
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000296659400045
DO  - DOI:10.1063/1.3657521
UR  - https://juser.fz-juelich.de/record/17056
ER  -