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New phase boundary in highly correlated, barely metallic V_2O_3

Carter, S. A. and Rosenbaum, T. F. and Honig, J. M. and Spalek, J. (1991) New phase boundary in highly correlated, barely metallic V_2O_3. Physical Review Letters, 67 (24). pp. 3440-3443. ISSN 0031-9007. doi:10.1103/PhysRevLett.67.3440.

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We compare the magnetic and transport properties of the low-temperature metal in nonstoichiometric and compressed vanadium sesquioxide. Antiferromagnetic order is robust for the full range of vanadium vacancy concentrations, but it can be suppressed with modest hydrostatic pressures. The temperature-pressure phase diagram for V_2O_3 thus includes a new T=0 boundary between antiferromagnetic and paramagnetic metals. Furthermore, analysis of the T→0 diffusive metallic conductivity at the approach to the insulator-metal transition indicates a different role for correlations depending upon the means employed to effect the transition.

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Alternate Title:New phase boundary in highly correlated, barely metallic V2O3
Additional Information:© 1991 The American Physical Society. Received 12 September 1991. We have benefited greatly from conversations with E. Abrahams and R. Bhatt. We are grateful to P. Metcalf for annealing the V_2O_3 crystals used in this research. T.F.R. thanks the Aspen Center for Physics where some of this work was accomplished. The work at The University of Chicago was supported by Grant No. NSF DMR 8816817. J.M.H. and J.S. were supported by MISCON Grant No. DE-FG02-90ER45427.
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NSFDMR 8816817
Department of Energy (DOE)DE-FG02-90ER45427
Issue or Number:24
Classification Code:PACS numbers: 71.30.+h, 72. 15.—v, 75.30.Kz
Record Number:CaltechAUTHORS:20140707-163037924
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47016
Deposited By: George Porter
Deposited On:10 Jul 2014 02:51
Last Modified:10 Nov 2021 17:33

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