Tunneling through an Anderson impurity between superconductors | |
Article | |
关键词: WAVE SUPERCONDUCTORS; JOSEPHSON-JUNCTIONS; CHARGE-TRANSPORT; QUANTUM DOTS; CONTACTS; CHANNEL; SURFACE; STATES; | |
DOI : 10.1103/PhysRevB.63.134515 | |
来源: SCIE |
【 摘 要 】
We consider an Anderson impurity (A) weakly connected to a superconducting electrode (S) on one side and a superconducting or a normal-metal electrode (N) on the other side. A general path-integral formalism is developed and the response of SAN and SAS junctions to a constant voltage bias V is elucidated, using a combination of the Keldysh technique (to handle nonequilibrium effects) acid a dynamical mean-field approximation (to handle repulsive Hubbard interactions). An interesting physics is exposed at subgap voltages (eV <
【 授权许可】
Free