Unconventional superconductivity in CuxBi2Se3

T. Kirzhner; E. Lahoud; K. B. Chaska; Z. Salman; A. Kanigel

doi:10.1103/PhysRevB.86.064517

Unconventional superconductivity in CuxBi2Se3

Superconductivity 2015-06-03 v2 Strongly Correlated Electrons

Authors: T. Kirzhner , E. Lahoud , K. B. Chaska , Z. Salman , A. Kanigel

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Abstract

We report point contact measurements in high quality single crystals of Cu0.2Bi2Se3. We observe three different kinds of spectra: (1) Andreev-reflection spectra, from which we infer a superconducting gap size of 0.6mV; (2) spectra with a large gap which closes above Tc at about 10K; and (3) tunneling-like spectra with zero-bias conductance peaks. These tunneling spectra show a very large gap of ~2meV (2Delta/KTc ~ 14).

Keywords

andreev reflection superconducting tunnel junctions optical conductivity

Cite

@article{arxiv.1111.5805,
  title  = {Unconventional superconductivity in CuxBi2Se3},
  author = {T. Kirzhner and E. Lahoud and K. B. Chaska and Z. Salman and A. Kanigel},
  journal= {arXiv preprint arXiv:1111.5805},
  year   = {2015}
}

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