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My Research Profile
Research topic : The main topic of my PhD study is growth and structural characterization of III-Nitrides and related heterostructures as well as Ga(N,As) alloys grown by molecular beam epitaxy. Thesis Abstract (PDF) Establishment: Division of Applied Semiconductor Physics (MBE group), MINA, MC2 , Chalmers University of Technology (CTH) , Gothenburg, Sweden. Period : Sept. 2000 - Jan. 2003
Summary of the topic: My licentiate topic was about the preparation and characterization of magnetic garnet thin films using pulsed laser deposition (PLD) technique for magneto-optic (MO) applications, in addition to the possibility to a next generation MO recording media. We were the first group to grow successfully Ce-substituted yttrium iron garnet (CexY3-xFe5O12) epitaxial films using the PLD technique. The large enhancement of MO effect found in the blue wavelength regime makes this material system promising as a next generation MO recording media.Thesis Abstract (PDF) Establishment: Division of Condensed Matter Physics (CMP), Royal Institute of Technology (KTH), Stockholm, Sweden. Period : Sept. 1996 - Nov. 1999
Summary of the topic: The thesis for my M.S. was about the classical and quantum behavior of an electron at the half-infinite space with uniform electric and magnetic fields. With the help of classical results, we evaluated the propagator of this system with path integral method. It is found that the electron in this system moves quantum mechanically in one dimension (i.e. quantum wire ). Thesis Abstract (PDF) Establishment: Department of Physics, Chungbuk National University (CBNU), Cheongju, Korea. Period : Mar. 1993 - Feb. 1995
Summary of the topic : For my B.S. thesis I and my co-author investigated how the term ''force'' was used in the high school physics textbooks. It was found that the ''force'' was used without any clear criterion between usual meaning and scientific meaning. The representation of a scientific term in the textbooks is very important for students to have right concept, because the scientific conception is found to be different from what students have in mind before they learn the physical meaning (preconception). This work was also published in the Bulletin of Science Education (Vol. 9:25 - 34, 1992). Thesis Abstract (PDF) Establishment: Department of Science Education, College of Education, Chungbuk National Univertsity, Cheongju, Korea. I hold an official certificate as a secondary school teacher for science (Physics, Chemistry, Biology, Geophysics). Period : Mar. 1989 - Feb. 1993
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