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Universality and critical behavior at the Mott transition
P Limelette1, A Georges, D Jérome
1Laboratoire de Physique des Solides (CNRS, U.R.A. 8502), Bâtiment 510, Université de Paris-Sud, 91405 Orsay, France. limelette@lps.u-psud.fr
Science (New York, N.Y.)
|October 4, 2003
Summary
We studied chromium-doped vanadium oxide (V2O3) conductivity under varying pressure. Our findings reveal universal properties near the Mott critical endpoint, similar to liquid-gas transitions, offering insights into correlated electron materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Correlated Electron Systems
Background:
- Vanadium oxide (V2O3) exhibits a metal-insulator transition.
- Chromium doping influences the electronic properties of V2O3.
- Understanding critical phenomena in correlated electron materials is crucial.
Purpose of the Study:
- Investigate the critical behavior of conductivity in Cr-doped V2O3 near the Mott insulator-metal transition.
- Determine critical exponents and scaling functions.
- Explore the universality of the observed phenomena.
Main Methods:
- Variable pressure technique for conductivity measurements.
- Systematic variation of pressure and temperature.
- Analysis of critical exponents and scaling functions.
Main Results:
- Detailed investigation of conductivity near the Mott critical endpoint.
- Determination of critical exponents and the scaling function.
- Observation of universal properties analogous to a liquid-gas transition.
Conclusions:
- The Mott critical endpoint in Cr-doped V2O3 exhibits universal behavior.
- This behavior mirrors that of a liquid-gas transition, suggesting a generic description.
- The findings provide insights into the fundamental physics of correlated electron materials.
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