Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 4: Electron Theory of Magnetism and Correlations

MA 4.8: Talk

Monday, March 17, 2025, 11:15–11:30, H19

The Laughlin vortex crystal in ideal Chern bands — •Saranyo Moitra and Inti Sodemann — Leipzig University, Leipzig, Germany

We have uncovered a novel phase transition of the celebrated Laughlin Fractional quantum Hall wave-function from its topologically ordered fluid phase onto a power-law-correlated vortex crystal in flat Chern bands with ideal quantum geometry. We will present a theory of ground state correlations and collective modes of these states across this transition and discuss their potential relevance to anomalous fractional quantum Hall phenomena in platforms such as moiré MoTe2, twisted bilayer graphene and pentalayer graphene.

Keywords: Fractional Quantum Hall effect; Twisted TMDC; Phase transitions; Flat Chern bands