Interface effects on the shot noise in normal metal- d-wave superconductor Junctions

Details Interface effects on the shot noise in normal metal- d-wave superconductor Junctions Interface effects on the shot noise in normal metal- d-wave superconductor Junctions

1999-12-10

arxiv.org/abs/cond-mat/9912168v1

Physics

Condensed Matter

Superconductivity

13 pages, 3 figures

Scientific paper

10.1103/PhysRevB.61.R11902

The current fluctuation in normal metal / d-wave superconductor junctions are studied for various orientation of the crystal by taking account of the spatial variation of the pair potentials. Not only the zero-energy Andreev bound states (ZES) but also the non-zero energy Andreev bound states influence on the properties of differential shot noise. At the tunneling limit, the noise power to current ratio at zero voltage becomes 0, once the ZES are formed at the interface. Under the presence of a subdominant s-wave component at the interface which breaks time-reversal symmetry, the ratio becomes 4e

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