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Nonlinear electric field effects at a continuous Mott-Hubbard transition

Husmann, A. and Brooke, J. and Rosenbaum, T. F. and Yao, X. and Honig, J. M. (2000) Nonlinear electric field effects at a continuous Mott-Hubbard transition. Physical Review Letters, 84 (11). pp. 2465-2468. ISSN 0031-9007. doi:10.1103/PhysRevLett.84.2465.

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We characterize the non-Ohmic portion of the conductivity at temperatures T < 1 K in the highly correlated transition metal chalcogenide Ni(S, Se)_2. Pressure tuning of the T = 0 metal-insulator transition reveals the influence of the quantum critical point and permits a direct determination of the dynamical critical exponent z = 2.7_(-0.4)^(+0.3) Within the framework of finite temperature scaling, we find that the spatial correlation length exponent ν and the conductivity exponent μ differ.

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Additional Information:© 2000 The American Physical Society. Received 27 September 1999. We are grateful to C. Roeser for expert technical help and to R. N. Bhatt and S. M. Girvin for illuminating discussions. T. F. R. thanks the Aspen Center for Physics where some of this work was performed. The work at the University of Chicago was supported by NSF No. DMR9801824; that at Purdue was supported by NSF No. DMR9612130.
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Issue or Number:11
Classification Code:PACS numbers: 71.30.+h, 71.27.+a, 72.80.Ga
Record Number:CaltechAUTHORS:20140707-163031933
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46975
Deposited By: George Porter
Deposited On:10 Jul 2014 22:47
Last Modified:10 Nov 2021 17:32

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