Scanning tunneling microscopy of superconducting topological surface states in Bi2Se3

Ian M. Dayton, Nicholas Sedlmayr, Victor Ramirez, Thomas C. Chasapis, Reza Loloee, Mercouri G Kanatzidis, Alex Levchenko, Stuart H. Tessmer

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this Rapid Communication we present scanning tunneling microscopy of a large Bi2Se3 crystal with superconducting PbBi islands deposited on the surface. Local density of states measurements are consistent with induced superconductivity in the topological surface state with a coherence length of order 540 nm. At energies above the gap the density of states exhibits oscillations due to scattering caused by a nonuniform order parameter. Strikingly, the spectra taken on islands also display similar oscillations along with traces of the Dirac cone, suggesting an inverse topological proximity effect.

Original languageEnglish
Article number220506
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume93
Issue number22
DOIs
Publication statusPublished - Jun 20 2016

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Surface states
Scanning tunneling microscopy
Superconductivity
Cones
scanning tunneling microscopy
Scattering
oscillations
Crystals
Communication
cones
superconductivity
communication
scattering
crystals
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Scanning tunneling microscopy of superconducting topological surface states in Bi2Se3. / Dayton, Ian M.; Sedlmayr, Nicholas; Ramirez, Victor; Chasapis, Thomas C.; Loloee, Reza; Kanatzidis, Mercouri G; Levchenko, Alex; Tessmer, Stuart H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 93, No. 22, 220506, 20.06.2016.

Research output: Contribution to journalArticle

Dayton, Ian M. ; Sedlmayr, Nicholas ; Ramirez, Victor ; Chasapis, Thomas C. ; Loloee, Reza ; Kanatzidis, Mercouri G ; Levchenko, Alex ; Tessmer, Stuart H. / Scanning tunneling microscopy of superconducting topological surface states in Bi2Se3. In: Physical Review B - Condensed Matter and Materials Physics. 2016 ; Vol. 93, No. 22.
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