TY - JOUR
T1 - Real-space investigation of structural changes at the metal-insulator transition in VO2
AU - Corr, Serena A.
AU - Shoemaker, Daniel P.
AU - Melot, Brent C.
AU - Seshadri, Ram
PY - 2010/7/30
Y1 - 2010/7/30
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.105.056404
DO - 10.1103/PhysRevLett.105.056404
M3 - Article
AN - SCOPUS:77955131883
SN - 0031-9007
VL - 105
JO - Physical review letters
JF - Physical review letters
IS - 5
M1 - 056404
ER -