Growth of AlN Epilayers on Sapphire Substrates by Using the Mixed-Source Hydride Vapor Phase Epitaxy Method
Injun Jeon1, Gang Seok Lee2, Kyoung Hwa Kim2, Hyung Soo Ahn2, Min Yang2, Sam Nyung Yi2, Hunsoo Jeon3, Chae Ryong Cho4, Suck-Whan Kim5
1Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea
2Department of Electronic Materials Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
3Power Semiconductor Commercialization Center, Busan Techno Park, Busan 46239, Korea
4Department of Nanoenergy Engineering and Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea
5Department of Physics, Andong National University, Andong 36729, Korea
Growing high-quality AlN epilayers is essential for the fabrication of AlN-based or GaN-based electronic devices that can be operated under high voltages and high frequencies. In this study, AlN epilayers were grown by two steps, (the growth of an AlGaN nucleation region and subsequently, the growth of pure AlN epilayers on the pre-grown AlGaN nucleation region), on sapphire substrates without a buffer layer by using a mixed (Al+Ga) source by the mixed-source HVPE method. The mixed-source HVPE method using a small quantity of Ga in the mixed source is effective for the growth of an AlN epilayer since it generates gaseous precursors by activating Al and covering its surface with Ga before oxidation by the residual oxygen in the reactor.
J. Korean Phys. Soc. 2019; 74: 1160-1165  https://doi.org/10.3938/jkps.74.1160
Conformal Frame Dependence on Cosmological Observations in Scalar-Tensor Theories of Gravity
Young-Hwan Hyun1, Yoonbai Kim2, Seokcheon Lee2
1Korea Institute of Science and Technology Information (KISTI), Daejeon 34141, Korea
2Department of Physics and Institute of Basic Science, Sungkyunkwan University, Suwon 16419, Korea
While the conformal transformation has proven to be a useful mathematical tool, its use has been a debate on whether the two conformal frames are physically equivalent or not. This question might not be answered at the classical level. We show the frame dependences of observable quantities like the Hubble parameter and angular diameter distance as a function of frame independent parameter, redshift. We explicitly show that if one adopts the one frame for the data analysis of observable quantities, then the obtained cosmological parameters should be applied to that frame only.
J. Korean Phys. Soc. 2019; 74: 1101-1111  https://doi.org/10.3938/jkps.74.1101
Most Cited
Cited by
Variations in the Raman Spectrum as a Function of the Number \ofGraphene Layers
J. Korean Phy. Soc. 2009; 55: 1299~1303  https://doi.org/10.3938/jkps.55.1299
Full Text(PDF) [download: 0]
A Gravity Dual of RHIC Collisions
J. Korean Phy. Soc. 2007; 50: 384~397  https://doi.org/10.3938/jkps.50.384
Full Text(PDF) [download: 0]
X-ray Diffraction Patterns of Thermally-reduced Graphenes
J. Korean Phy. Soc. 2010; 57: 1649~1652  https://doi.org/10.3938/jkps.57.1649
Full Text(PDF) [download: 0]
A New Phase at a Finite Quark Density from AdS/CFT
J. Korean Phy. Soc. 2008; 52: 1734~1739  https://doi.org/10.3938/jkps.52.1734
Full Text(PDF) [download: 0]
Al-ZnO Thin Films as Transparent Conductive Oxides : Synthesis, Characterization, and Application Tests
J. Korean Phy. Soc. 2007; 50: 622~625  https://doi.org/10.3938/jkps.50.622
Full Text(PDF) [download: 0]
The Updated Vversion of Chinese Evaluated Nuclear Data Library (CENDL-3.1)
J. Korean Phy. Soc. 2011; 59: 1052~1056  https://doi.org/10.3938/jkps.59.1052
Full Text(PDF) [download: 0]
Annealing Effect on the Electrical and the Optical Characteristics of Undoped ZnO Thin Films Grown on Si Substrates by RF Magnetron Sputtering
J. Korean Phy. Soc. 2007; 51: 1378~1382  https://doi.org/10.3938/jkps.51.1378
Full Text(PDF) [download: 0]
An Explanation of Efficiency Droop in InGaN-based Light Emitting Diodes: Saturated Radiative Recombination Rate at Randomly Distributed In-Rich Active Areas
J. Korean Phy. Soc. 2011; 58: 503~508  https://doi.org/10.3938/jkps.58.503
Full Text(PDF) [download: 0]
Chitosan-Coated Ferrite (Fe3O4) Nanoparticles as a T2 Contrast Agent for Magnetic Resonance Imaging
J. Korean Phy. Soc. 2010; 56: 868~873  https://doi.org/10.3938/jkps.56.868
Full Text(PDF) [download: 0]
The Proton Energy Response of a LYSO Crystal
J. Korean Phy. Soc. 2008; 52: 925~929  https://doi.org/10.3938/jkps.52.925
Full Text(PDF) [download: 0]
Effect of Oxygen on the Optical and the Electrical Properties of Amorphous InGaZnO Thin Films Prepared by RF Magnetron Sputtering
J. Korean Phy. Soc. 2008; 53: 2019~2023  https://doi.org/10.3938/jkps.53.2019
Full Text(PDF) [download: 0]
Results from the IAEA Benchmark of Spallation Models
J. Korean Phy. Soc. 2011; 59: 791~796  https://doi.org/10.3938/jkps.59.791
Full Text(PDF) [download: 0]
The effect of thermal and ultrasonic treatment on formation of graphene oxide nanosheets
J. Korean Phy. Soc. 2010; 56: 1097~1102  https://doi.org/10.3938/jkps.56.1097
Full Text(PDF) [download: 0]
First-Principles Study of the Surface of Wurtzite ZnO and ZnS - Implications for Nanostructure Formation
J. Korean Phy. Soc. 2009; 54: 867~872  https://doi.org/10.3938/jkps.54.867
Full Text(PDF) [download: 0]
Synthesis of Zinc Ferrite and Its Photocatalytic Application under Visible Light
J. Korean Phy. Soc. 2009; 54: 204~208  https://doi.org/10.3938/jkps.54.204
Full Text(PDF) [download: 0]
Status of the JEFF Nuclear Data Library
J. Korean Phy. Soc. 2011; 59: 1057~1062  https://doi.org/10.3938/jkps.59.1057
Full Text(PDF) [download: 0]
Photocatalytic Hydrogen Generation from Water-methanol MixturesUsing Nanocrystalline ZnFe$_2$O$_4$ under Visible Light Irradiation
J. Korean Phy. Soc. 2009; 55: 1472~1477  https://doi.org/10.3938/jkps.55.1472
Full Text(PDF) [download: 0]
Properties of TiO2 Films Prepared for Use in Dye-sensitized Solar Cells by Using the Sol-gel Method at Different Catalyst Concentrations
J. Korean Phy. Soc. 2010; 57: 1049~1053  https://doi.org/10.3938/jkps.57.1049
Full Text(PDF) [download: 0]
  Comparison between SiOC Thin Film by plasma enhance chemical vapor deposition and SiO2 Thin Film by Fourier Transform Infrared Spectroscopy  
J. Korean Phy. Soc. 2010; 56: 1150~1155  https://doi.org/10.3938/jkps.56.1150
Full Text(PDF) [download: 0]
Atomic Layer Deposition of Ruthenium and Ruthenium-oxide ThinFilms by Using a Ru(EtCp)$_{2}$ Precursor and Oxygen Gas
J. Korean Phy. Soc. 2009; 55: 32~37  https://doi.org/10.3938/jkps.55.32
Full Text(PDF) [download: 0]
Go to page for Current Issue
Go to page for Current Issue
  • e-Submission
  • For review & Editor

Indexed/Covered by

  • Scopus