Flat band and Lifshitz transition in long-range-ordered supergraphene obtained by Erbium intercalation - IPHT Access content directly
Journal Articles Physical Review Research Year : 2023

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

Ludovic Josien
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Abstract

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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hal-04024130 , version 1 (10-03-2023)

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Ahmad Zaarour, Vincent Malesys, Joan Teyssandier, Marion Cranney, Emmanuel Denys, et al.. Flat band and Lifshitz transition in long-range-ordered supergraphene obtained by Erbium intercalation. Physical Review Research, 2023, 5 (1), pp.013099. ⟨10.1103/PhysRevResearch.5.013099⟩. ⟨hal-04024130⟩
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