Title | Real-Space Investigation of Structural Changes at the Metal-Insulator Transition in VO{\_}2 |
Publication Type | Journal Article |
Year of Publication | 2010 |
Authors | Corr SA, Shoemaker DP, Melot BC, Seshadri R |
Journal | Physical Review Letters |
Volume | 105 |
Pagination | 056404 |
Date Published | 07/2010 |
ISSN | 0031-9007 |
Keywords | CNSI, CSC, DOE, HP, MRL |
Abstract | 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. |
URL | http://link.aps.org/doi/10.1103/PhysRevLett.105.056404 |
DOI | 10.1103/PhysRevLett.105.056404 |
Grant:
HP, CSC