Physics – Condensed Matter – Superconductivity
Scientific paper
2011-12-08
Phys. Rev. Lett. 108, 107005 (2012)
Physics
Condensed Matter
Superconductivity
PRL in press, 4 pages, 3 figures + Supplementary Material; supercedes 1109.3464 and includes additional results
Scientific paper
10.1103/PhysRevLett.108.107005
The recently discovered superconductor CuxBi2Se3 is a candidate for three-dimensional time- reversal-invariant topological superconductors, which are predicted to have robust surface Andreev bound states hosting massless Majorana fermions. In this work, we analytically and numerically find the linearly dispersing Majorana fermions at k = 0, which smoothly evolve into a new branch of gapless surface Andreev bound states near the Fermi momentum. The latter is a new type of Andreev bound states resulting from both the nontrivial band structure and the odd-parity pairing symmetry. The tunneling spectra of these surface Andreev bound states agree well with a recent point-contact spectroscopy experiment[1] and yield additional predictions for low temperature tunneling and photoemission experiments.
Fu Liang
Hsieh Timothy H.
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