Kuipers, Jack and Waltner, Daniel and Petitjean, Cyril and Berkolaiko, Gregory and Richter, Klaus
Semiclassical gaps in the density of states of chaotic Andreev billiards.
Phys. Rev. Lett. 104, 027001.
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Other URL: http://prl.aps.org/abstract/PRL/v104/i2/e027001, http://arxiv.org/abs/0907.2660
The connection of a superconductor to a chaotic ballistic quantum dot leads to interesting phenomena, most notably the appearance of a hard gap in its excitation spectrum. Here we treat such an Andreev billiard semiclassically where the density of states is expressed in terms of the classical trajectories of electrons (and holes) that leave and return to the superconductor. We show how classical ...
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