Structure-Imposed Electronic Topology in Cove-Edged Graphene Nanoribbons

Arnold FM, Liu TJ, Kuc A, Heine T (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review Letters American Physical Society

Book Volume: 129

Article Number: 216401

Journal Issue: 21

DOI: 10.1103/PhysRevLett.129.216401

Abstract

In cove-edged zigzag graphene nanoribbons (ZGNR-Cs), one terminal CH group per length unit is removed on each zigzag edge, forming a regular pattern of coves that controls their electronic structure. Based on three structural parameters that unambiguously characterize the atomistic structure of ZGNR-Cs, we present a scheme that classifies their electronic state (i.e., if they are metallic, topological insulators, or trivial semiconductors) for all possible widths N, unit lengths a, and cove position offsets at both edges b, thus showing the direct structure-electronic structure relation. We further present an empirical formula to estimate the band gap of the semiconducting ribbons from N, a, and b. Finally, we identify all geometrically possible ribbon terminations and provide rules to construct ZGNR-Cs with a well-defined electronic structure.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE)

How to cite

APA:

Arnold, F.M., Liu, T.-J., Kuc, A., & Heine, T. (2022). Structure-Imposed Electronic Topology in Cove-Edged Graphene Nanoribbons. Physical Review Letters, 129(21). https://doi.org/10.1103/PhysRevLett.129.216401

MLA:

Arnold, Florian M., et al. "Structure-Imposed Electronic Topology in Cove-Edged Graphene Nanoribbons." Physical Review Letters 129.21 (2022).

BibTeX: Download