Condensed Matter Seminar: Quantum geometry in semiconductor heterostructures

Raquel Querioz (Columbia University)
- | David Rittenhouse Laboratory, A4

Quantum geometry quantifies the momentum space textures of the Bloch wavefunctions and impacts substantially the physics of multiband systems. This is also true for van der Waals semiconductors, which are usually described within a parabolic, effective mass, approximation. In this talk, I will start by a general discussion on quantum geometry, discuss examples of physical responses associated with geometry in insulators and finally discuss how quantum geometry can be invaluable to observe exotic correlated phenomena in transition metal dichalcogenides heterostructures, such as the recent observation of fractional excitations.