| EFFECTS OF COLLECTIVE MODES ON PAIR TUNNELING INTO SUPERCONDUCTORS |
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| Author(s): KIM YB, WEN XG |
| Source: PHYSICAL REVIEW B Volume: 48 Issue: 9 Pages: 6319-6329 Published: SEP 1 1993 |
| Times Cited: 13 References: 25 |
| Abstract: The effect of collective modes inside superconductors on N-S (normal-metal-superconductor) tunneling and S-S (superconductor-superconductor) tunneling is investigated. For the N-S case, we calculate the electron-pair tunneling current in the regime where the Andreev-scattering effect can be observed. The resulting current has a nonlinear contribution from the pair tunneling into collective modes inside the superconductor as well as the usual linear contribution due to the tunneling into the condensate (i.e., Andreev-scattering effect). We also consider S-S tunneling between a bulk superconductor and a superconducting thin film at zero and finite temperature. The electron-pair tunneling is found to be a sensitive probe to study the dynamical properties of the superconducting condensate, in particular in two dimensions and/or near the superconductor-insulator transition. |
| Document Type: Article |
| Language: English |
| Reprint Address: KIM, YB (reprint author), MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA |
| Publisher: AMERICAN PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA |
| Subject Category: Physics, Condensed Matter |
| IDS Number: LX348 |
| ISSN: 0163-1829 |