articlePhysical Review LettersFeb 18, 2020GREEN OA

Strange Metal in Magic-Angle Graphene with near Planckian Dissipation

YCYuan CaoDCDebanjan ChowdhuryDRDaniel Rodan‐LegrainOROriol Rubies-BigordàKWKenji Watanabe

Massachusetts Institute of Technology · Cornell University · +1 more institution

PubMed
Indexed inarxivcrossrefpubmed

Abstract

Recent experiments on magic-angle twisted bilayer graphene have discovered correlated insulating behavior and superconductivity at a fractional filling of an isolated narrow band. Here 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. This behavior is reminiscent of similar behavior in other strongly correlated systems, often denoted "strange metals," such as cuprates, iron pnictides, ruthenates, and cobaltates, where the observations are at odds with expectations in a weakly interacting Fermi liquid. We also extract…

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Topics & keywords

Topics
Keywords
  • Bilayer graphene
  • Condensed matter physics
  • Magic angle
  • Graphene
  • Superconductivity
  • Scattering rate
  • Materials science
  • Scattering
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