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8 papers
Ultrafast Electron-Lattice Coupling Dynamics in VO2 and V2O3 Thin Films
Elsa Abreu, Stephanie N. Gilbert Corder, Sun Jin Yun +11
Ultrafast optical pump - optical probe and optical pump - terahertz probe spectroscopy were performed on vanadium dioxide (VO2) and vanadium sesquioxide (V2O3) thin films over a wi…
Infrared spectroscopy and nano-imaging of the insulator-to-metal transition in vanadium dioxide
M. M. Qazilbash, M. Brehm, G. O. Andreev +11
We present a detailed infrared study of the insulator-to-metal transition (IMT) in vanadium dioxide (VO2) thin films. Conventional infrared spectroscopy was employed to investigate…
Switching of the Mott transition based on the hole-driven MIT theory
Hyun-Tak Kim, Bong-Jun Kim, Yong Wook Lee +2
Switching voltage of first-order metal-insulator transition (MIT) in VO_2, an inhomogeneous strongly correlated system, is changed by irradiating an infrared light with wavelength,…
Mott transition in VO2 revealed by infrared spectroscopy and nano-imaging
M. M. Qazilbash, M. Brehm, Byung-Gyu Chae +9
Electrons in correlated insulators are prevented from conducting by Coulomb repulsion between them. When an insulator-to-metal transition is induced in a correlated insulator by do…
Monoclinic and Correlated Metal Phase in VO_2 as Evidence of the Mott Transition: Coherent Phonon Analysis
Hyun-Tak Kim, Yong-Wook Lee, Bong-Jun Kim +6
In femtosecond pump-probe measurements, the appearance of coherent phonon oscillations at 4.5 THz and 6.0 THz indicating the rutile metal phase of VO_2 does not occur simultaneousl…
Hole-driven MIT theory, Mott transition in VO_2, MoBRiK
Hyun-Tak Kim, Bong-Jun Kim, Yong Wook Lee +3
For inhomogeneous high-T_c superconductors, hole-driven metal-insulator transition (MIT) theory explains that the gradual increase of conductivity with increasing hole doping is du…