Flat band and Lifshitz transition in long-range-ordered supergraphene obtained by Erbium intercalation

Autor: A. Zaarour, V. Malesys, J. Teyssandier, M. Cranney, E. Denys, J. L. Bubendorff, A. Florentin, L. Josien, F. Vonau, D. Aubel, A. Ouerghi, C. Bena, L. Simon
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Physical Review Research, Vol 5, Iss 1, p 013099 (2023)
Druh dokumentu: article
ISSN: 2643-1564
DOI: 10.1103/PhysRevResearch.5.013099
Popis: We report the observation of graphene doped up to the Lifshitz transition obtained solely by the intercalation of Erbium atoms. ARPES measurements show that a wide flat band is generated around the M point of the Brillouin zone. We propose that this is the effect of an induced spin-orbit coupling. Scanning Tunneling Microscopy (STM) experiments reveal a longrange ordered hexagonal superstructure: we argue that this reflects the ordering of the intercalated Er atoms acting as impurities. This system provides a playground to study the interaction between a magnetic order and a divergent density of states at the Fermi level.
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