Kagome Quantum Oscillations in Graphene Superlattices.

Autor: de Vries FK; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Slizovskiy S; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom.; Department of Physics & Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom., Tomić P; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Krishna Kumar R; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom.; Department of Physics & Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.; ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Barcelona 08028, Spain., Garcia-Ruiz A; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom.; Department of Physics & Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom., Zheng G; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Portolés E; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Ponomarenko LA; Department of Physics, University of Lancaster, Lancaster LA1 4YW, United Kingdom., Geim AK; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom.; Department of Physics & Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom., Watanabe K; National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Taniguchi T; National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Fal'ko V; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom.; Department of Physics & Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.; Henry Royce Institute for Advanced Materials, Manchester M13 9PL, United Kingdom., Ensslin K; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Ihn T; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland., Rickhaus P; Laboratory for Solid State Physics, ETH Zürich, Zürich CH-8093, Switzerland.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2024 Jan 17; Vol. 24 (2), pp. 601-606. Date of Electronic Publication: 2024 Jan 05.
DOI: 10.1021/acs.nanolett.3c03524
Abstrakt: 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.
Databáze: MEDLINE