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arXiv · 2304.02910

Effect of electronic correlation on topological end-states in finite-size graphene nanoribbons

Antoine Honet·Luc Henrard·Vincent Meunier
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Abstract

Finite size armchair graphene nanoribbons (GNR) of different families are theoretically studied using the Hubbard model in both mean-field and GW approximations, including spin correlation effects. It is shown that correlation primarily affect the properties of topological end states of the nanoribbons. A representative structure of each of the three GNR families is considered but the 7-atom width nanoribbon is studied in detail and compared to experimental results, showing a clear improvement when correlations are included. Using on numerically computed local density of states, spin-polarized measurements in scanning tunneling microscopy are also suggested to help distinguish and highlight correlation effects.

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Antoine Honet, Luc Henrard, Vincent Meunier. 2023-04-06. Effect of electronic correlation on topological end-states in finite-size graphene nanoribbons. https://doi.org/10.1088/1361-648x%2Facf35f

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