J. Phys. IV France 09 (1999) Pr10-301-Pr10-303
Out-of-plane superfluid density of a layered organic superconductor : The coherent Josephson tunnelingS. Tomic1, M. Pinteric1, 2, K. Maki3, M. Prester1, Ð. Drobac1, O. Milat1, D. Schweitzer4, I. Heinen5 and W. Strunz5
1 Institute of Physics, Zagreb, Croatia
2 Faculty of Civil Engineering, University of Maribor, Maribor, Slovenia
3 Department of Physics and Astronomy, USC, Los Angeles, U.S.A.
4 3. Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany
5 Anorganisch-Chemiches Institut, Universität Heidelberg, Heidelberg, Germany
Measurements of AC magnetic susceptibility in k-(BEDT-TTF)2Cu[N(CN)2Br] show that the b-axis penetration depth below Tc exhibits behaviour different from that observed in the ac plane, which exhibits the T-linear dependence. In agreement with earlier measurements, a leading quadratic temperature dependence is found at low temperatures. The temperature dependence of the out-of plane superfluid density is shown to best agree with a model of d-wave superconducting layers coupled by coherent Josephson tunneling.
© EDP Sciences 1999