title: 2019 description: Twist physics after the 2018 bang. Reconstruction near 1. Reconstruction, ABC-trilayer/hBN superconductivity signatures. Same three industrial bottlenecks. date: 2019-01-01 tags:
- timeline
Evidence: Named 2019 papers. Plant openings stay on companies.
Twist follow-on
- Yoo, Engelke, et al., Nat. Mater. 18, 448 (2019). Atomic reconstruction in twisted bilayer graphene; crossover near θc ≈ 1° from incommensurate moiré to commensurate domains with soliton walls.
- Chen, Sharpe, Gallagher, et al., Nature 572, 215 (2019). ABC trilayer graphene / hBN moiré: Mott-like states at 1/4 and 1/2 filling below ~20 K; signatures of tunable superconductivity under a displacement field. Not magic-angle bilayer; a different stack.
- Mid-2019 STM / spectroscopy cluster on magic-angle bilayer (Kerelsky, Xie, Jiang in Nature; Choi preprint) — maps the flat-band correlations the 2018 transport papers announced.
Still two sheets (or three) in a fridge. Not a tote.
Industry texture
Reviews: graphene works as additive or electrode film, not as silicon. Powder tox literature accumulates; that is not a conspiracy. Later NIOSH field work sits on that stack.
Unchanged bottlenecks: dispersion, grade, 1 Ah cell → pack.