Current-enhanced anisotropy of Bi2Sr2CaCu2O8 in the mixed state

B. Khaykovich (1) , Y.N. Myasoedov (1) , K. Teitelbaum (1) , E. Zeldov (1) , D.T. Fuchs (2) , T. Tamegai (3) , S. Ooi (3) , M. Konczykowski (4) , S.F.W.R. Rycroft (5)

1 Department of Condensed Matter Physics, Weizmann Institute of Science, 76100 Rehovot
2 UC Santa Barbara - University of California [Santa Barbara]
3 Department of Applied Physics, University of Tokyo, Kongo, Bunkyo-ku, Tokyo 113-8656
4 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
5 Research Center in Superconductivity, University of Cambridge, Cambridge CB3 0HE, United Kingdom

Transport and local magnetization measurements carried out simultaneously in Bi2Sr2CaCu2O8 (BSCCO) crystals reveal finite resistivity well below the magnetic irreversibility line, where the vortices should be pinned. This resistivity is non-monotonic with temperature and extremely non-linear. We describe the new observation in terms of a shear-induced decoupling, in which the pancake vortices flow only in the top few layers and are decoupled from the pinned vortices in the rest of the crystal. COP. 2000 Elsevier Science B.V. All rights reserved.

Domaines: Supraconductivité [cond-mat.supr-con]

B. Khaykovich, Y.N. Myasoedov, K. Teitelbaum, E. Zeldov, D.T. Fuchs, et al.. Current-enhanced anisotropy of Bi2Sr2CaCu2O8 in the mixed state. Physica C: Superconductivity and its Applications, 2000, 341-348 (PART 3), pp.985. ⟨hal-00725061⟩