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Temperature dependence and control of the Mott transition in VO_2 based devices
Hyun-Tak Kim, B. G. Chae, D. H. Youn +2
The transition voltage of an abrupt metal-insulator transition (MIT), observed by applying an electric field to two-terminal devices fabricated on a Mott insulator VO_2 film, decre…
Fabrication and Electrical Properties of Pure VO2 Phase Films
B. G. Chae, D. H. Youn, H. T. Kim +2
We have grown VO2 thin films by laser ablation for electronic device applications. In obtaining the thin films of the pure VO2 phase, oxygen partial pressure is a critical paramete…
Observation of Mott Transition in VO_2 Based Transistors
Hyun-Tak Kim, B. G. Chae, D. H. Youn +2
An abrupt Mott metal-insulator transition (MIT) rather than the continuous Hubbard MIT near a critical on-site Coulomb energy U/U_c=1 is observed for the first time in VO_2, a stro…
Explanation of small I_cR_n values observed in inhomogeneous superconductors
Hyun-Tak Kim
For an inhomogeneous high-Tc superconductor, band-filling dependence of Josephson I_cR_n product is deduced at T=0 K by means of measurement; this is an extension of the Ambegaokar…
Gate-Induced Mott Transition
Hyun-Tak Kim, B. G. Chae, D. H. Youn +2
For a strongly correlated material, VO2, near a critical on-site Coulomb energy U/Uc=1, the abrupt Mott metal-insulator transition (MIT) rather than the continuous Hubbard MIT is o…
Temperature Dependence of Optical Spectra for the CDW Gap and Optical Phonons in BaBiO_3
Hyun-Tak Kim, Hidetoshi Minami, Hiromoto Uwe
We have studied the temperature dependence of the optical spectra for the CDW gap and optical phonons in a single crystal of BaBiO_3 and a film deposited by laser ablation. The int…