منابع مشابه
Metal-insulator Phase Transition in Vo2
-The effects of doping and uniaxial stress on the structural and magnetic properties of V02 are reviewed. Important electron-electron correlation effects are deduced : (i) in the metallic phase from the results obtained in V I ~ N ~ ~ O ~ alloys, (ii) in the insulating phases of pure V02 at ambiant pressure (MI), under uniaxial stress or in the presence of Cr impurities (T and M2). Discovered i...
متن کاملSuperelastic metal-insulator phase transition in single-crystal VO2 nanobeams
W. Fan,1,2 S. Huang,1 J. Cao,1,3 E. Ertekin,4,5 C. Barrett,1,3 D. R. Khanal,1,3 J. C. Grossman,5 and J. Wu1,3,4,* 1Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, USA 2Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, China 3Materials Sciences Division, Lawrence Berkeley Na...
متن کاملOrbital-assisted metal-insulator transition in VO2.
We found direct experimental evidence for an orbital switching in the V 3d states across the metal-insulator transition in VO2. We have used soft-x-ray absorption spectroscopy at the V L2,3 edges as a sensitive local probe and have determined quantitatively the orbital polarizations. These results strongly suggest that, in going from the metallic to the insulating state, the orbital occupation ...
متن کاملElectrical oscillations induced by the metal-insulator transition in VO2
We systematically investigate the characteristics of an electrical oscillation observed in two-terminal vanadium dioxide VO2 devices. These oscillations are observed at room temperature in a simple electrical circuit without inductive components. The circuit is composed only of a dc voltage source, the VO2 device, and a standard resistor connected in series with the device. We explain why the o...
متن کاملMetal-insulator transition in VO2: a Peierls-Mott-Hubbard mechanism
The electronic structure of VO2 is studied in the frameworks of local density approximation (LDA) and LDA+U to give a quantitative description of the metal-insulator (MI) transition in this system. It is found that, both structural distortion and the local Coulomb interaction, play important roles in the transition. An optical gap, comparable to the experimental value has been obtained in the m...
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ژورنال
عنوان ژورنال: Le Journal de Physique Colloques
سال: 1976
ISSN: 0449-1947
DOI: 10.1051/jphyscol:1976408