Condensed Matter Physics in the Alps: Geometric Frustration, Topology, Flat Bands, and Correlation in Kagome and Van der Waals Systems

Session

Wednesday Morning Session II, Chair S. Zhou

Jan 7, 2026, 10:15 AM

Saas Fee

2. Optical pumping of topological states in twisted MoTe2

Atac Imamouglu (ETH)

1/7/26, 10:15 AM

van der Waals experimental

Invited talk (by invitation only)

I will describe recent experiments where we used optical pumping techniques to manipulate the Chern number of integer and fractional Chern insulators in twisted MoTe2 homobilayer.

37. Moire materials - Twisted graphene and the quantum twisting microscope

Dima EFETOV (Ludwig-Maximilians-Universität München)

1/7/26, 10:50 AM

van der Waals experimental

Invited talk (by invitation only)

The Quantum Twisting Microscope (QTM) is a groundbreaking instrument that enables energy- and momentum-resolved measurements of quantum phases via tunneling spectroscopy across twistable van der Waals heterostructures. In this work, we significantly enhance the QTMs resolution and extend its measurement capabilities to higher energies and twist angles by incorporating hexagonal boron nitride...