Electron transport in normal-metal/superconductor junctions
| Autor: | Hongwei Zhao, Xin-Zhong Yan, Chia-Ren Hu |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Conductance Non-equilibrium thermodynamics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Electron transport chain Metal Condensed Matter::Superconductivity visual_art visual_art.visual_art_medium Rectangular potential barrier Quantum tunnelling Surface states |
| Zdroj: | Physical Review B. 61:14759-14764 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.61.14759 |
| Popis: | On the basis of the Keldysh method of nonequilibrium systems, we develop a theory of electron tunneling in normal-metal--superconductor junctions. By using the tunneling Hamiltonian model (being appropriate for the tight-binding systems), the tunneling current can be exactly obtained in terms of the equilibrium Green functions of the normal metal and the superconductor. We calculate the conductance of various junctions. The discrepancy between the present treatment and the well-known scheme by Blonder, Tinkham, and Klapwijk is found for some junctions of low interfacial potential barrier. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|