Physics and Astronomy CMP Seminar - Dr. Donna Sheng
- When
- Tuesday, November 17, 20262:30 PM – 3:30 PM ESTAdd to calendarGoogle Calendar
- Where
- Sharp Lab 215Sharp Laboratory, University of Delaware, Newark, DE 19716, USAOpen in Maps
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About
"Topological Chiral Superconductivity in the Hofstadter-Hubbard Models"
Moir`e materials provide exciting platforms for studying the interplay of strong electronic correlation and large magnetic flux effects. In this talk, I will report our recent progress on identifying unconventional topological superconductivity for the doped Hofstadter-Hubbard models.
Based on large-scale density matrix renormalization group and tensor network simulations, we demonstrate strong evidence for a robust chiral superconducting (SC) phase with dominant power-law pairing correlations for finite cylinders, nonzero pairing orders for infinite 2D systems, and a quantized topological Chern number. The SC phase emerges at very weak interaction and grows stronger at intermediate interaction strengths (U) for a wide range of hole doping. We also discuss the possible distinct nature of the normal state in different U regimes. Our work provides theoretical predictions for the emergence of topological superconductivity from doping topological Chern bands or magnetic flux induced chiral spin liquid states of Moir`e materials.