51 citations · 183 across the 9 of their papers we have counts for
9 papers
Evidence for nitrogen gas surface doping of the BiSe topological insulator
Michael Gottschalk, Mal-Soon Lee, Eric Goodwin +6
Using scanning tunneling spectroscopy we have studied the effects of nitrogen gas exposure on the bismuth selenide density of states. We observe a shift in the Dirac point which is…
Dirac surface states in superconductors: a dual topological proximity effect
Nicholas Sedlmayr, E. W. Goodwin, Michael Gottschalk +12
In this paper we present scanning tunneling microscopy of BiSe with superconducting Nb deposited on the surface. We find that the topologically protected surface states of…
Scanning tunneling microscopy of superconducting topological surface states in BiSe
Ian M. Dayton, Nicholas Sedlmayr, Victor Ramirez +5
In this paper we present scanning tunneling microscopy of a large crystal with superconducting PbBi islands deposited on the surface. Local density of…
Understanding Bulk Defects in Topological Insulators from Nuclear-Spin Interactions
Dimitrios Koumoulis, Belinda Leung, Thomas C. Chasapis +4
Non-invasive local probes are needed to characterize bulk defects in binary and ternary chalcogenides. These defects contribute to the non-ideal behavior of topological insulators.…
Site-Specific Contributions to the Band Inversion in a Topological Crystalline Insulator
Dimitrios Koumoulis, Thomas Christos Chasapis, Belinda Leung +5
In a topological crystalline insulator (TCI) the inversion of the bulk valence and conduction bands is a necessary condition to observe surface metallic states. Solid solutions of…
Two Band Model Interpretation of the p to n Transition in Ternary Tetradymite Topological Insulators
T. C. Chasapis, D. Koumoulis, B. Leung +5
The requirement for large bulk resistivity in topological insulators has led to the design of complex ternary and quaternary phases with balanced donor and acceptor levels. A commo…