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

## Details

**Authors** Chen et al.

**Year** 2026

**Publisher** Nature Materials

**Discipline** Materials Science

[Read it at the publisher](https://doi.org/10.1038/s41563-026-02711-6) 
10.1038/s41563-026-02711-6

## In authors' words

### 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.

## Commentary

### 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.

**Patterns it shows** D, S

**Added** 2026-08-16

**How to cite this** Chen et al. (2026). Layer-engineered quantum anomalous Hall effect in twisted rhombohedral graphene. Nature Materials.