Author:

Keywords:

yba2cu3o7-delta single-crystal, high-tc superconductors, untwinned yba2cu3o7-delta, theoretical-analysis, transport, lattice, Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Physics, Applied, Physics, Condensed Matter, Materials Science, Physics, YBA2CU3O7-DELTA SINGLE-CRYSTAL, HIGH-TC SUPERCONDUCTORS, UNTWINNED YBA2CU3O7-DELTA, THEORETICAL-ANALYSIS, TRANSPORT, LATTICE, 02 Physical Sciences, 03 Chemical Sciences, 09 Engineering, Fluids & Plasmas, 34 Chemical sciences, 40 Engineering, 51 Physical sciences

Abstract:

The superconductivity fluctuation contribution kappa(B) to the thermal conductivity of a Bi2Sr1.8Ca1.2Cu2O8+y polycrystal is extracted from precise experimental data. The crossover from two-dimensional (2D) to 3D behavior theoretically predicted by Varlamov and Livanov is well marked. The crossover temperature T-VL and the amplitude of the fluctuation contribution lead to realistic values for the interlayer coupling energy J(C) and the transport relaxation time tau near T-c.