Explanation of small I_cR_n values observed in inhomogeneous superconductors

Details Explanation of small I_cR_n values observed in inhomogeneous superconductors Explanation of small I_cR_n values observed in inhomogeneous superconductors

2003-06-17

arxiv.org/abs/cond-mat/0306421v1

Physica C 399 (2003) 48-52.

Physics

Condensed Matter

Superconductivity

4 Pages, 4 Figures

Scientific paper

For an inhomogeneous high-Tc superconductor, band-filling dependence of Josephson I_cR_n product is deduced at T=0 K by means of measurement; this is an extension of the Ambegaokar - Baratoff (AB) theory based on the s-wave theory. The product is given by J_{obs}R_n ={1.57}{rho}{Gap_i}={rho}J_iR_n, where 0<{rho}<=1 is band filling (or local density), and {Gap_i} is the intrinsic superconducting true gap and small. When {rho}=1, J_{obs}R_n=J_iR_n is the intrinsic Josephson true product (or the AB product), where J_i is the intrinsic Josephson true current occurring by Cooper pair. When 0<{rho}<1, J_{obs}R_n is an average of J_iR_n over the measurement region and is the effect of measurement. The J_{obs}R_n explains small I_cR_n values observed by experiments. Furthermore, the intrinsic gap, 8.5<{Gap_i}<17 meV, is analyzed from I_cR_n data of Bi-2212. d-wave superconductive components do not exist in Bi-2212 crystals.

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