Topological Superconductivity and Surface Andreev Bound States in Doped Semiconductors: Application to CuxBi2Se3

Details Topological Superconductivity and Surface Andreev Bound States in Doped Semiconductors: Application to CuxBi2Se3 Topological Superconductivity and Surface Andreev Bound States in Doped Semiconductors: Application to CuxBi2Se3

2011-09-15

arxiv.org/abs/1109.3464v2

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

The recently discovered superconductor CuxBi2Se3[1] is a candidate for three-dimensional time-reversal-invariant topological superconductors[2], which are predicted to have robust surface Andreev bound states hosting massless Majorana fermions. In this work, we present an analytical and numerical study of the surface Andreev bound state wavefunction and dispersion. We find the topologically protected Majorana fermions at k = 0, as well as a new type of surface Andreev bound states at finite k. We relate our results to a recent point-contact spectroscopy experiment[3].

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