Critical Aspects of the Mott Transition

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Science  03 Oct 2003:
Vol. 302, Issue 5642, pp. 13
DOI: 10.1126/science.302.5642.13a

Critical phenomena associated with the Mott metal-insulator transition (MIT) play a role in the high-temperature superconductivity of cuprates and the colossal magnetoresistance of manganites. The MIT observed in V2O3 is the classical paradigm of the Mott transition, but despite numerous studies, detailed and clean experiments have been difficult. Limelette et al. (p. 89; see the Perspective by Kotliar) now report electrical conductivity measurements of Cr-doped V2O3 as a function of temperature and pressure in a parameter range that spans the critical endpoint for the correlation-driven MIT. The results may provide a universal way to describe the MIT in a variety of correlated-electron systems.


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