Abstract
The dc Josephson current and its fluctuations in superconductor/dirty normal metal/superconductor junctions are studied numerically by using the recursive Green function method, where a d-wave pairing symmetry is assumed in superconductors as it is in high-Tc materials. The Josephson current is sensitive to the orientation angle (α) between the crystalline axis of the high-Tc superconductors and the normal of the junction interface. When the orientation angle is π/4, the fluctuations of the Josephson current become larger than those with α=0 because of the zero-energy state formed at junction interfaces.
Original language | English |
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Pages (from-to) | 221-224 |
Number of pages | 4 |
Journal | Physica C: Superconductivity and its applications |
Volume | 412-414 |
Issue number | SPEC. ISS. |
DOIs | |
Publication status | Published - 2004 Oct 1 |
Externally published | Yes |
Keywords
- Josephson current
- Mesoscopic fluctuation
- Zero-energy state
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering