51 citations · 183 across the 9 of their papers we have counts for
5 papers · 1 filter
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…
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.…
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…
Understanding the role and interplay of heavy hole and light hole valence bands in the thermoelectric properties of PbSe
Thomas C. Chasapis, Yeseul Lee, Euripides Hatzikraniotis +4
The thermoelectric properties of PbSe have significantly improved in recent years reaching figures of merit ZT 1.6. The transport properties of the hole doped high temperature ther…
Antimony arsenide: Chemical ordering in the compound SbAs
Daniel P. Shoemaker, Thomas C. Chasapis, Dat Do +5
The semimetallic Group V elements display a wealth of correlated electron phenomena due to a small indirect band overlap that leads to relatively small, but equal, numbers of holes…