Giant elastoresistance in magic-angle twisted bilayer graphene.

Authors

Xuetao Ma, Zhaoyu Liu, Jiaqi Cai, Kenji Watanabe, Takashi Taniguchi, Xiaodong Xu, Jiun-Haw Chu, Matthew Yankowitz

Published in

Science (New York, N.Y.). Volume 394. Issue 6825. Pages 768-772. Nov 12, 2026. Epub Nov 12, 2026.

Abstract

Strongly correlated and topological phases in moiré materials are exquisitely sensitive to lattice geometry at both atomic and superlattice length scales. Twist angle, pressure, and strain directly modify the lattice and thus act as highly effective tuning parameters. Here, we examined electrical transport in twisted bilayer graphene subjected to continuous uniaxial strain. Near the magic angle (≈1.1°), devices exhibited a pronounced elastoresistance that depended on band filling and temperature, with a gauge factor more than two orders of magnitude larger than that of conventional metals. In selected doping regimes, the elastoresistance exhibited a Curie-Weiss-like temperature divergence. We discuss possible microscopic origins, including nematic fluctuations and enhanced electronic entropy from fluctuating isospin moments. Our work establishes uniaxial strain as a versatile probe of correlated physics in a moiré material.

PMID:
43019428
Bibliographic data and abstract were imported from PubMed on 13 Nov 2026.

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