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IQIM Postdoctoral and Graduate Student Seminar

Friday, April 14, 2023
12:00pm to 1:00pm
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East Bridge 114
Superconductivity in materials with flat bands: Insights from the quantum geometry
Valerio Peri, Moore Postdoctoral Scholar,

Abstract: Superconductivity in materials with flat bands underscores the crucial role that band geometry plays in determining correlated phases. Recent research has shown that the geometry of topologically non-trivial bands can greatly enhance the superfluid weight, leading to higher superconducting critical temperatures. Through auxiliary-field Monte Carlo simulations, we demonstrate the importance of quantum geometry beyond the mean-field regime. We further provide lower bounds for the critical temperature of multi-band systems based on their momentum space irreducible representations in all 2D space groups. Lastly, we shed light on the similarities and differences between superconductivity and boson superfluidity in flat bands.

Lunch will be provided, following the talk, on the lawn north of the Bridge Arcade

Attendees joining in person must demonstrate that they comply with Caltech's vaccination requirements (present Caltech ID or AWS ID or vaccination and booster confirmation).

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at [email protected].