Andreev reflection and tunneling spectrum on metal–superconductor–metal junctions
Andreev reflection and tunneling spectrum on metal–superconductor–metal junctions
Jiajun Ouyang, W. LiMing(), Liangbin Hu
Department of Physics, and Laboratory of Quantum Information Technology, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
The tunneling spectrum of an electron and a hole in metal–superconductor–metal junctions is computed using the Blonder–Tinkham–Klapwijk method. The incident and the outgoing currents finally balance each other by an interface charge inside the superconductor and metal junction. The present computation shows a more abundant structure compared to that on a metal–superconductor junction, such as the resonance at bias voltages above the energy gap of the superconductor. The density of the interface charge shows a quantum-like oscillation.
