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Herve's Kim:HT [3 articles]

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	Inhomogeneous electronic state near the insulator-to-metal transition in the correlated oxide VO[sub 2] Physical Review B (Condensed Matter and Materials Physics), Vol. 80, No. 11. (2009), 115115. by A. Frenzel, M. M. Qazilbash, M. Brehm, et al.Byung G. Chae, Bong J. Kim, Hyun T. Kim, A. V. Balatsky, F. Keilmann, D. N. Basov posted to vo2 phase-separation mott by Herve on 2009-10-04 15:01:04 Abstract Copy My Attachments My Copy Abstract We investigate the percolative insulator-to-metal transition (IMT) in films of the correlated material vanadium dioxide (VO2). Scattering-type scanning near-field infrared microscopy and atomic force microscopy were used to explore the relationship between the nucleation of metallic regions and the topography in insulating VO2. We demonstrate that the IMT begins within 10 nm from grain boundaries and crevices by using mean curvature and statistical analysis. We also observe coexistence of insulating and metallic domains in a single crystalline grain that points to ...
	Phase-transition driven memristive system Applied Physics Letters, Vol. 95, No. 4. (2009), 043503. by T. Driscoll, H. T. Kim, B. G. Chae, M. Di Ventra, D. N. Basov posted to vo2 non-equilibrium mott by Herve on 2009-10-04 14:57:56 Copy My Attachments My Copy
	Micrometer x-ray diffraction study of VO[sub 2] films: Separation between metal-insulator transition and structural phase transition Physical Review B (Condensed Matter and Materials Physics), Vol. 77, No. 23. (2008), 235401. by Bong J. Kim, Yong W. Lee, Sungyeoul Choi, et al.Jung W. Lim, Sun J. Yun, Hyun T. Kim, Tae J. Shin, Hwa S. Yun posted to vo2 phase-separation mott by Herve on 2009-08-20 12:30:35 Abstract Copy My Attachments My Copy Abstract In order to clarify whether VO2 is a Mott insulator or a Peierls insulator, the metal-insulator transition (MIT) and the structural phase transition (SPT) are simultaneously monitored for VO2 films by current-voltage curve and diffraction measurements using a synchrotron micro-x-ray beam. In the regime showing a metallic conductivity below the SPT temperature (approximately 70 °C), only the diffraction planes of the monoclinic structure are observed, while planes of the tetragonal structure are absent. This observation reveals the presence of a monoclinic ...

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