Speaker
Valerio Peri
Description
Recent theoretical works unveiled that crystalline symmetries can stabilize topologically fragile Bloch bands that challenge our very notion of topology: one can trivialize these bands through the addition of trivial Bloch bands. Here, we show via auxiliary-field Monte Carlo simulations how fragile topology enhances the superfluid weight and hence the superconducting critical temperature. This feature is particularly relevant in flat-band systems where the conventional contribution to the superfluid weight vanishes and might explain the high transition temperature observed in magic-angle twisted bilayer graphene.
Primary author
Valerio Peri
Co-authors
Prof.
Sebastian Huber
(ETH Zurich )
Prof.
Andrei Bernevig
(Princeton University)
Dr
Zhida Song
(Princeton University)
