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Zeitschrift für Physik B Condensed Matter
ISSN: 0722-3277 (printed version)
ISSN: 1431-584X (electronic version)
Abstract Volume 100 Issue 3 (1996) pp 329-333
Interface scattering effect on the differential conductance of normal-metal superconductor junctions
Z. C. Dong (1), D. Y. Xing (1)(3), Z. D. Wang (2), L. Sheng (1)(2)
(1) Department of Physics, Nanjing University, Nanjing 210008, People's Republic of China
(2) Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong
(3) Chinese Center of Advanced Science and Technology (World Laboratory), P.O. Box 8730, Beijing, People's Republic of China
Received: 1 September 1995
Abstract. Taking into account the interface roughness of normal-metal/superconductor junction, we propose an effective Hamiltonian for the interface scattering. In the framework of Blonder-Tinkham-Klapwijk (BTK) model, we calculate the differential conductance of N/S junction in the presence of the interface scattering. As well, the effect of the finite lifetime of the quasi-particles due to the inelastic scattering is also addressed. Our results are in qualitative agreement with experiments.
PACS: 74.80Fp; 72.10Fk
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