Flat bands for electrons in rhombohedral graphene multilayers with a twin boundary

Abstract

Topologically protected flat surface bands make thin films of rhombohedral graphite an appealing platform for searching for strongly correlated states of 2D electrons. In this work, we study rhombohedral graphite with a twin boundary stacking fault and analyse the semimetallic and topological properties of low-energy bands localised at the surfaces and at the twinned interface. We derive an effective 4-band low energy model, where we implement the full set of Slonczewski-Weiss-McClure (SWMcC) parameters, and find the conditions for the bands to be localised at the twin boundary, protected from the environment-induced disorder. This protection together with a high density of states at the charge neutrality point, in some cases -- due to a Lifshitz transition, makes this system a promising candidate for hosting strongly-correlated effects.

8 pages, 5 figures

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Cited by in corpus (7)

• Superconductivity and correlated phases in non-twisted bilayer and trilayer graphene
• Mixed-Stacking Few-Layer Graphene as an Elemental Weak Ferroelectric Material
• Built-in Bernal gap in large-angle-twisted monolayer-bilayer graphene
• Identification of graphite with perfect rhombohedral stacking by electronic Raman scattering
• Solitons induced by an in-plane magnetic field in rhombohedral multilayer graphene
• Solitons in binary compounds with stacked two-dimensional honeycomb lattices
• Electronic states at twist stacking faults in rhombohedral graphite