Absolute negative resistance of a tunnel contact between superconductors with a nonequilibrium quasiparticle distribution function
Abstract
An experimental observation of the resistance of a tunnel junction between superconductors going negative when excess quasi-particles are excited in the electrode having the larger energy gap is reported on. The present effect occurs at bias voltages less than the difference of the values of the energy gaps in the superconducting electrodes divided by e. Data are reported for a system of tunnel junctions formed by aluminum films with thicknesses a1 = 60 A (with critical temperature of 2.15 K) and a2 = a3 = 100 A (with critical temperature of 2.0 K). The change in the shape of the I-V characteristics of the rectifying junction caused by a current flowing through the injection contact is studied.
- Publication:
-
ZhETF Pisma Redaktsiiu
- Pub Date:
- December 1986
- Bibcode:
- 1986ZhPmR..44..529G
- Keywords:
-
- Electric Contacts;
- Electron Tunneling;
- Elementary Excitations;
- Negative Resistance Devices;
- Superconductors;
- Electronics and Electrical Engineering