Recent experiments on magic-angle twisted bilayer graphene have discovered correlated insulating behavior and superconductivity at a fractional filling of an isolated narrow band. In this paper we show that magic-angle bilayer graphene exhibits another hallmark of strongly correlated systems --- a broad regime of T−linear resistivity above a small, density dependent, crossover temperature--- for a range of fillings near the correlated insulator. We also extract a transport "scattering rate", which satisfies a near Planckian form that is universally related to the ratio of (kBT/ℏ). Our results establish magic-angle bilayer graphene as a highly tunable platform to investigate strange metal behavior, which could shed light on this mysterious ubiquitous phase of correlated matter.
@article{arxiv.1901.03710,
title = {Strange metal in magic-angle graphene with near Planckian dissipation},
author = {Yuan Cao and Debanjan Chowdhury and Daniel Rodan-Legrain and Oriol Rubies-Bigordà and Kenji Watanabe and Takashi Taniguchi and T. Senthil and Pablo Jarillo-Herrero},
journal= {arXiv preprint arXiv:1901.03710},
year = {2020}
}