Mott Transition in VO 2 Revealed by Infrared Spectroscopy and Nano-Imaging
Electronics and Telecommunications Research Institute · University of California San Diego · +2 more institutions
Abstract
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 doping or heating, the resulting conducting state can be radically different from that characterized by free electrons in conventional metals. We report on the electronic properties of a prototypical correlated insulator vanadium dioxide in which the metallic state can be induced by increasing temperature. Scanning near-field infrared microscopy allows us to directly image nanoscale metallic puddles that appear at the onset of the insulator-to-metal transition. In combination with far-field infrared spectroscopy, the data reveal the…
Citation impact
- FWCI
- 35.91
- Percentile
- 100%
- References
- 31
Authors
12- MMM. M. QazilbashCorresponding
Electronics and Telecommunications Research Institute, University of California San Diego, Center for Integrated Nanotechnologies, Max Planck Institute of Biochemistry
- MBM. Brehm
Electronics and Telecommunications Research Institute, University of California San Diego, Center for Integrated Nanotechnologies, Max Planck Institute of Biochemistry
- BGByung Gyu Chae
Electronics and Telecommunications Research Institute, University of California San Diego, Center for Integrated Nanotechnologies, Max Planck Institute of Biochemistry
- PHPei-Chun Ho
Electronics and Telecommunications Research Institute, University of California San Diego, Center for Integrated Nanotechnologies, Max Planck Institute of Biochemistry
- GAGregory Andreev
Electronics and Telecommunications Research Institute, University of California San Diego, Center for Integrated Nanotechnologies, Max Planck Institute of Biochemistry
Topics & keywords
- Metal–insulator transition
- Condensed matter physics
- Infrared
- Electron
- Materials science
- Nanoscopic scale
- Infrared spectroscopy
- Doping