Andreev bound states in rounded corners of d-wave superconductors

Details Andreev bound states in rounded corners of d-wave superconductors Andreev bound states in rounded corners of d-wave superconductors

2006-06-08

arxiv.org/abs/cond-mat/0606208v1

Physica C 460-462, 1143 (2007)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.physc.2007.03.243

Andreev bound states at boundaries of d-wave superconductors are strongly influenced by the boundary geometry itself. In this work, the zero-energy spectral weight of the local quasiparticle density of states is presented for the case of wedge-shaped boundaries with rounded corners. Generally, both orientation of the d-wave and the specific local reflection properties of the rounded wedges determine, whether Andreev bound states exist or not. For the bisecting line of the wedge being parallel to the nodal direction of the d-wave gap function, strong zero-energy Andreev bound states are expected at the round part of the boundary.

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