[DSRP Evidence](https://dsrpevidence.org/)

# Layer-engineered quantum anomalous Hall effect in twisted rhombohedral graphene

Chen et al., 2026, Nature Materials — Materials Science

Patterns: [Distinctions](https://dsrpevidence.org/pattern/distinctions), [Systems](https://dsrpevidence.org/pattern/systems)

## In short

A purely compositional variable (number of stacked atomic layers) sets a discrete, whole-system property (the topological Chern number) that no single layer possesses alone.

## What they found (results)

In twisted monolayer-plus-N-layer rhombohedral graphene stacks, the quantum anomalous Hall state's Chern number equals the layer count N (verified for N = 3, 4, 5), letting the topological invariant be programmed by adding or removing graphene layers.

These researchers were not testing DSRP. The finding is theirs; the correspondence to DSRP is drawn by this site.

[Source](https://doi.org/10.1038/s41563-026-02711-6)