TITLE: Fractional quantum Hall physics in moiré materials
AUTHOR: Nicolas Morales-Duran - Flatiron Institute. Center for Computational Quantum Physics, Nueva York
INVITED BY: Leni Bascones
WHEN: June, 16 - 12PM
WHERE: Salón de Actos, ICMM
ABSTRACT: Moiré materials have emerged as a versatile platform to investigate the interplay between wave function topology and electronic correlations. Recent experiments on moiré transition metal dichalcogenides (TMDs) have reported the first observations of fractional Chern insulators (FCIs)--exotic phases that exhibit fractional quantum Hall physics in the absence of an external magnetic field. In this talk, I will introduce the adiabatic approximation, a mapping from TMD moiré materials onto an effective fractional quantum Hall problem. I will then discuss how this approximation provides a simple yet powerful framework for understanding the experimental phase diagram of moiré TMDs. In this context, I will present recent results on the collective excitations of moiré FCIs and their competition with other phases, including charge density wave orders and superconductivity.
