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document
Yokoyama, T. (author), Reutlinger, Johannes (author), Belzig, Wolfgang (author), Nazarov, Y.V. (author)
We consider the spectrum of Andreev bound states (ABSs) in an exemplary four-terminal superconducting structure where four chaotic cavities are connected by quantum point contacts to the terminals and to each other forming a ring. We nickname the resulting device 4T-ring. Such a tunable device can be realized in a 2D electron gas...
journal article 2017
document
Reutlinger, J. (author), Glazman, L. (author), Nazarov, Y.V. (author), Belzig, W. (author)
The superconducting proximity effect leads to strong modifications of the local density of states in diffusive or chaotic cavity Josephson junctions, which displays a phase-dependent energy gap around the Fermi energy. The so-called minigap of the order of the Thouless energy ETh is related to the inverse dwell time in the diffusive region in...
journal article 2014
document
Reutlinger, J. (author), Glazman, L. (author), Nazarov, Y.V. (author), Belzig, W. (author)
The density of Andreev levels in a normal metal (N) in contact with two superconductors (S) is known to exhibit an induced minigap related to the inverse dwell time. We predict a small secondary gap just below the superconducting gap edge—a feature that has been overlooked so far in numerous microscopic studies of the density of states in S?N?S...
journal article 2013