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Mass enhancement and magnetic order at the Mott-Hubbard transition

Carter, S. A. and Rosenbaum, T. F. and Metcalf, P. and Honig, J. M. and Spalek, J. (1993) Mass enhancement and magnetic order at the Mott-Hubbard transition. Physical Review B, 48 (22). pp. 16841-16844. ISSN 1098-0121. doi:10.1103/PhysRevB.48.16841.

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We study the evolution with pressure P and band filling y of the heat capacity, Hall coefficient, and resistivity at the approach to the T→0 Mott-Hubbard metal-insulator transition (MIT) in highly correlated V_(2-y)O_3. Under P, the electronic effective mass m* diverges at the MIT with a negligible change in carrier concentration n away from half-filling. Conversely, in the doped system m* actually decreases as the MIT is approached, while n increases linearly with y. The low-T magnetic order in the metal helps us deconvolute contributions from charge correlations and spin fluctuations.

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Additional Information:© 1993 The American Physical Society. Received 7 September 1993. We are grateful to G. Zimanyi for helpful discussions. The work at the University of Chicago was supported by NSF Contract No. DMR92-04820. J.M.H. and J.S. were supported on MISCON Grant No. DE-FG02-90ER45427.
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Department of Energy (DOE)DE-FG02-90ER45427
Issue or Number:22
Record Number:CaltechAUTHORS:20140707-163036975
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47008
Deposited By: George Porter
Deposited On:09 Jul 2014 18:15
Last Modified:10 Nov 2021 17:33

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