Quasiparticle Interference in Trigonally Warped Graphene Systems
ORAL
Abstract
Lifshitz transitions and divergent density of states (DOS) in trigonally warped graphene systems have been pointed out to be responsible for the unexpected magnetism and superconductivity discovered in recent transport experiments. However, direct evidence is yet to be provided in any experiment. Here we show that quasiparticle interference, imaged by spectroscopic imaging scanning tunneling microscopy, provides direct information of the trigonally warped Fermi surfaces and hence a starting point for examining their instabilities under electron-electron interactions.
*We acknowledge the Texas Advanced Computing Center (TACC) for providing resources that have contributed to the research results reported in this work. We acknowledge support by the Army Research Office under grant number W911NF-18-1-0416 and by the National Science Foundation under grant numbers DMR-1945351 through the CAREER program, DMR-1921581 through the DMREF program, and DMR-2105139 through the CMP program.
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Presenters
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Nuno V Castanheira
- University of Texas at Dallas