CMTopic
Correlated states of magic-angle twisted graphene
Two or three graphene sheets stacked with a small twist (about 1.1 degrees for two sheets) form a long-wavelength interference pattern (a moire pattern) in which electrons move very slowly. Electron repulsion then dominates and produces insulators, magnetism and unusual metals whose nature depends on how many electrons a gate voltage adds.
Why it matters
It is the cleanest tunable system of strongly repelling electrons in flat bands, so it tests theories also applied to cuprates and heavy-fermion metals.
Review
E. Y. Andrei, A. H. MacDonald, Graphene bilayers with a twist, Nature Materials, 2020. https://doi.org/10.1038/s41563-020-00840-0 reference checked
Proof
- Signed record
- 5046e808e6ff…
- Public log
- Entry 151, in checkpoint 2,123
- Bitcoin date
- Block 969,698, 2026-10-03