Conductance Fluctuation of the Normal Metal in an SNS Structure |
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Authors: | SHI Junren DONG Jinming XING Dingyul WANG Zidan |
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Institution: | 1. Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008, China;
2. Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong, China |
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Abstract: | The conductance of a clean normal metal spanning between two superconductors (SNS structure) has been investigated. It is found that the conductance fluctuates periodically with the phase difference of two superconductors. When the pairing symmetry in one side of the superconductors is dx2-y2, the fluctuation period tends to be π instead of 2π, and the phase dependence of its conductance depends strongly on the orientation of the junction in contradistinction to the s-wave case. It can be used as a new method to determine the pairing symmetry of the high-Tc superconductors. |
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Keywords: | d-wave superconductor conductance fluctuation |
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