Speaker
Description
Van der Waals heterostructures and moiré materials have emerged as a powerful platform for quantum simulation. Their exceptional tunability—through twist angle, stacking configuration, electrostatic gating, and substrates engineering—offers an unprecedented level of control over electronic degrees of freedom. These systems naturally host flat bands, strong electronic correlations, and symmetry‑protected degeneracies, making them prime candidates for realizing exotic quantum phases. However, a central challenge remains: how can we deliberately navigate the vast moiré landscape to obtain a phase of interest, given the immense combinatorial experimental choices available and the theoretical difficulty of modeling systems with thousands of atoms per moiré unit cell?
In this talk, I will present a symmetry‑based and perturbative framework that addresses this challenge by shifting the focus from microscopic modeling to effective low‑energy design principles. Rather than relying on brute‑force simulations, we show how lattice symmetries and the geometry of coupling at the moiré scale strongly constrain the allowed terms in the emergent moiré Hamiltonian. These constraints provide practical and predictive guidelines for material selection and heterostructure engineering. More specifically, I will demonstrate how coupling a moiré system to a carefully chosen substrate, or twisting selected monolayers, can induce and enhance topological band structures. I will then discuss how the same design principles can be leveraged to promote superconductivity. By identifying moiré systems with favorable pairing channels, enhanced density of states, and tunable interactions, we outline routes toward stabilizing superconductivity at elevated temperatures.
Overall, the work presented [1] provides a mature method to harness the potentials of moiré materials as programmable quantum simulators, hinting at how to engineer these system to study topology and the physics of strongly coupled superconductivity.
Overall, the work presented in Ref. [1] establishes a systematic and scalable approach to harnessing the potential of moiré materials as programmable quantum simulators, and provides concrete guidance for engineering platforms to study topology and strongly coupled superconductivity.
[1] Nakatsuji, Cano, and Crépel, High‑throughput discovery of moiré homobilayers guided by topology and energetics, arXiv:2512.15851
| Keyword-1 | Moire materials |
|---|---|
| Keyword-2 | Topological phases |
| Keyword-3 | Superconductivity |