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Kagome Quantum Oscillations in Graphene Superlattices

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  • Folkert K. de Vries
  • Sergey Slizovskiy
  • Petar Tomić
  • Roshan Krishna Kumar
  • Aitor Garcia-Ruiz
  • Giulia Zheng
  • Elías Portolés
  • Leonid A. Ponomarenko
  • Andre K. Geim
  • Kenji Watanabe
  • Takashi Taniguchi
  • Vladimir Fal’ko
  • Klaus Ensslin
  • Thomas Ihn
  • Peter Rickhaus
<mark>Journal publication date</mark>17/01/2024
<mark>Journal</mark>Nano Letters
Issue number2
Number of pages6
Pages (from-to)601-606
Publication StatusPublished
Early online date5/01/24
<mark>Original language</mark>English


Electronic spectra of solids subjected to a magnetic field are often discussed in terms of Landau levels and Hofstadter-butterfly-style Brown–Zak minibands manifested by magneto-oscillations in two-dimensional electron systems. Here, we present the semiclassical precursors of these quantum magneto-oscillations which appear in graphene superlattices at low magnetic field near the Lifshitz transitions and persist at elevated temperatures. These oscillations originate from Aharonov–Bohm interference of electron waves following open trajectories that belong to a kagome-shaped network of paths characteristic for Lifshitz transitions in the moire superlattice minibands of twistronic graphenes.