Carter, S. A. and Rosenbaum, T. F. and Lu, M. and Jaeger, H. M. and Metcalf, P. and Honig, J. M. and Spalek, J. (1994) Magnetic and transport studies of pure V_2O_3 under pressure. Physical Review B, 49 (12). pp. 7898-7903. ISSN 1098-0121. doi:10.1103/PhysRevB.49.7898. https://resolver.caltech.edu/CaltechAUTHORS:20140707-163036581
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Abstract
We report a systematic study of the resistivity and magnetic susceptibility of pure V_2O_3, the original Mott-Hubbard system at half filling, for pressures 0≤P≤25 kbar and temperatures 0.35≤T≤300 K. We also study (V_(0.99)Ti_(0.01)_2O_3 under pressure in order to elucidate the role of disorder on a metal-insulator transition in the highly correlated limit. Despite the low level of doping, we find that the two systems are very different. We observe a conventional collapsing of the Mott-Hubbard gap only for stoichiometric V_2_O3; the Ti disorder stabilizes the long-range antiferromagnetic order and a magnetic Slater gap. Moreover, we discover different P-T phase diagrams for the two systems, with a decoupling of the charge and spin degrees of freedom at the approach to the T=0, pressure-driven metal-insulator transition in pure V_2O_3.
| Item Type: | Article | |||||||||
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| Alternate Title: | Magnetic and transport studies of pure V2O3 under pressure | |||||||||
| Additional Information: | © 1994 The American Physical Society. Received 29 November 1993. The work at the University of Chicago was supported by the NSF Materials Research Laboratory under Grant No. DMR88-19860. S.A.C. acknowledges support from NSF Grant No. DMR92-04820. The work at Purdue University was supported under MISCON Grant No. DE-FG02-90ER45427. | |||||||||
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| Issue or Number: | 12 | |||||||||
| DOI: | 10.1103/PhysRevB.49.7898 | |||||||||
| Record Number: | CaltechAUTHORS:20140707-163036581 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140707-163036581 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 47005 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 09 Jul 2014 20:05 | |||||||||
| Last Modified: | 10 Nov 2021 17:33 |
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