期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.056404
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资金
- DOE Office of Basic Energy Sciences [W-31-109-Eng.-38]
- LANL-UCSB Institute for Multiscale Materials Studies
- NSF [DMR 0449354]
- MRSEC [DMR 0520415)]
- Hewlett-Packard
Synchrotron x-ray total scattering studies of structural changes in rutile VO2 at the metal-insulator transition temperature of 340 K reveal that monoclinic and tetragonal phases of VO2 coexist in equilibrium, as expected for a first-order phase transition. No evidence for any distinct intermediate phase is seen. Unbiased local structure studies of the changes in V-V distances through the phase transition, using reverse Monte Carlo methods, support the idea of phase coexistence and point to the high degree of correlation in the dimerized low-temperature structure. No evidence for short-range V-V correlations that would be suggestive of local dimers is found in the metallic phase. A A
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