Observation of Fractional Quantum Anomalous Hall Effect in Twisted MoTe2 Bilayer - March 19, 2024

Explore groundbreaking research on quantum states of matter in this physics lecture that examines the experimental observation of the Fractional Quantum Anomalous Hall (FQAH) effect in twisted MoTe2 bilayer systems. Delve into the fascinating interplay between spontaneous symmetry breaking and topology, understanding how these interactions create exotic quantum states. Learn about the quantum anomalous Hall effect's manifestation of integer quantum Hall effect at zero magnetic field, and discover how strong electron-electron interactions can lead to the emergence of FQAH effect without Landau level formation. Through combined magneto-optical and transport measurements, examine the anomalous Hall state near filling factor -1/2 and its similarities to the composite Fermi liquid phase in half-filled lowest Landau levels of two-dimensional electron gas at high magnetic field. Understand the significance of these findings for future research into charge fractionalization and anyonic statistics at zero magnetic field.