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

doi:10.1103/PhysRevB.93.220506

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

Northwestern University

Research output: Contribution to journal › Article

3 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 language	English
Article number	220506
Journal	Physical Review B
Volume	93
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.93.220506
Publication status	Published - Jun 20 2016

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ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Dayton, I. M., Sedlmayr, N., Ramirez, V., Chasapis, T. C., Loloee, R., Kanatzidis, M. G., Levchenko, A., & Tessmer, S. H. (2016). Scanning tunneling microscopy of superconducting topological surface states in Bi2Se3. Physical Review B, 93(22), [220506]. https://doi.org/10.1103/PhysRevB.93.220506

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AU - Levchenko, Alex

AU - Tessmer, Stuart H.

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Access to Document

10.1103/PhysRevB.93.220506