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Published November 15, 1998 | Version Published
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Magnetic correlations and quantum criticality in the insulating antiferromagnetic, insulating spin liquid, renormalized Fermi liquid, and metallic antiferromagnetic phases of the Mott system V_2O_3

Creators

  • 1. ROR icon Brookhaven National Laboratory
  • 2. ROR icon Johns Hopkins University
  • 3. ROR icon National Institute of Standards and Technology
  • 4. ROR icon NEC (United States)
  • 5. ROR icon University of California, Santa Cruz
  • 6. ROR icon Oak Ridge National Laboratory
  • 7. ROR icon University of Chicago
  • 8. ROR icon Purdue University West Lafayette
  • 9. ROR icon United States Army Research Laboratory

Abstract

Magnetic correlations in all four phases of pure and doped vanadium sesquioxide (V_2O_3) have been examined by magnetic thermal-neutron scattering. Specifically, we have studied the antiferromagnetic and paramagnetic phases of metallic V_(2-y)O_3, the antiferromagnetic insulating and paramagnetic metallic phases of stoichiometric V_2O_3, and the antiferromagnetic and paramagnetic phases of insulating V_(1.944)Cr_(0.056)O_3. While the antiferromagnetic insulator can be accounted for by a localized Heisenberg spin model, the long-range order in the antiferromagnetic metal is an incommensurate spin-density wave, resulting from a Fermi surface nesting instability. Spin dynamics in the strongly correlated metal are dominated by spin fluctuations with a "single lobe'' spectrum in the Stoner electron-hole continuum. Furthermore, our results in metallic V_2O_3 represent an unprecedentedly complete characterization of the spin fluctuations near a metallic quantum critical point, and provide quantitative support for the self-consistent renormalization theory for itinerant antiferromagnets in the small moment limit. Dynamic magnetic correlations for ħω

Additional Information

© 1998 The American Physical Society. Received 28 April 1998. We gratefully acknowledge discussions and communications with T. M. Rice, S. K. Sinha, Q. M. Si, G. Sawatzky, L. F. Mattheiss, G. Kotliar, C. Castellani, A. Fujimori, M. Takigawa, A. J. Millis, R. J. Birgeneau, G. Shirane, S. M. Shapiro, C. Varma, and T. Moriya. W. B. would like to thank R. W. Erwin, J. W. Lynn, D. A. Neumann, and J. J. Rush for their hospitality during experiments at NIST. W.B. and C.B. thank C. L. Chien and Q. Xiao for use of their laboratory for sample preparations. The work at JHU was supported by the NSF through Grant No. DMR-9453362, at BNL by DOE under Contract No. DE-AC02-98CH10886, at ORNL by DOE under Contract No. DE-AC05-96OR22464, at Purdue by MISCON Grant No. DE-FG02-90ER45427, and at the University of Chicago by the NSF through Grant No. DMR-9507873.

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Published - PhysRevB.58.12727.pdf

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Additional details

Additional titles

Alternative title
Magnetic correlations and quantum criticality in the insulating antiferromagnetic, insulating spin liquid, renormalized Fermi liquid, and metallic antiferromagnetic phases of the Mott system V2O3

Identifiers

Eprint ID
46978
Resolver ID
CaltechAUTHORS:20140707-163032301

Funding

NSF
DMR-9453362
Department of Energy (DOE)
DE-AC02-98CH10886
Department of Energy (DOE)
DE-AC05-96OR22464
Department of Energy (DOE)
DE-FG02-90ER45427
NSF
DMR-9507873

Dates

Created
2014-07-09
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Updated
2021-11-10
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