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Universal vortex-state Hall conductivity of YBa2Cu3O7 single crystals with differing correlated disorder

Beam, D. A. and Yeh, N.-C. and Holtzberg, F. (1998) Universal vortex-state Hall conductivity of YBa2Cu3O7 single crystals with differing correlated disorder. Journal of Physics: Condensed Matter, 10 (26). pp. 5955-5964. ISSN 0953-8984.

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The vortex-state Hall conductivity ([sigma][sub]xy) of YBa2Cu3O7 single crystals in the anomalous-sign-reversal region is found to be independent of the density and orientation of the correlated disorder. After the anisotropic-to-isotropic scaling transformation is carried out, a universal scaled Hall conductivity [sigma][bar][sub]xy is obtained as a function of the reduced temperature (T/T[sub]c) and scaled magnetic field strength (H[bar]) for five samples with different densities and orientation of controlled defects. The transport scattering times {tau], derived from applying the model given by Feigel'man et al (Feigel'man M V, Geshkenbein V B, Larkin A I and Vinokur V M 1995 Pis. Zh. Eksp. Teor. Fiz. 62 811 (Engl. Transl. 1995 JETP Lett. 62 835)) to the universal Hall conductivity [sigma bar](T/T[sub]c, H[bar]), are consistent in magnitude with those derived from other measurements for quasiparticle scattering, and are much smaller than the thermal relaxation time of vortex displacement and than the vortex–defect interaction time. Our experimental results and analyses therefore suggest that the anomalous sign reversal in the vortex-state Hall conductivity is associated with the intrinsic properties of type-II superconductors, rather than extrinsic disorder effects.

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Yeh, N.-C.0000-0002-1826-419X
Additional Information:© 1998 IOP. Received 5 January 1998, Print publication: Issue 26 (6 July 1998). This work was supported by NSF Grant No DMR-9401315, ONR Grant No N00014-91-J-1556, and the Packard Foundation. We gratefully acknowledge Dr Marcin Konczykowski for performing the ion irradiation at GANIL in Caen, France, and for his insightful comments. We also thank Dr Arkadii V Samoilov for useful comments.
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Office of Naval Research (ONR)N00014-91-J-1556
David and Lucile Packard FoundationUNSPECIFIED
Issue or Number:26
Record Number:CaltechAUTHORS:BEAjpcm98
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ID Code:474
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Deposited On:22 Jun 2005
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