Topological Signatures in the Electronic Structure of Graphene Spirals

Stas.M. Avdoshenko, Pekka Koskinen, Haldun Sevincli, Alexey A. Popov, Claudia G. Rocha

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    Abstract

    Topology is familiar mostly from mathematics, but also natural sciences have found its concepts useful. Those concepts have been used to explain several natural phenomena in biology and physics, and they are particularly relevant for the electronic structure description of topological insulators and graphene systems. Here, we introduce topologically distinct graphene forms - graphene spirals - and employ density-functional theory to investigate their geometric and electronic properties. We found that the spiral topology gives rise to an intrinsic Rashba spin-orbit splitting. Through a Hamiltonian constrained by space curvature, graphene spirals have topologically protected states due to time-reversal symmetry. In addition, we argue that the synthesis of such graphene spirals is feasible and can be achieved through advanced bottom-up experimental routes that we indicate in this work.
    Original languageEnglish
    Article number1632
    JournalScientific Reports
    Volume3
    ISSN2045-2322
    Publication statusPublished - 2013

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