Defects in graphene: A topological description

نویسندگان

چکیده

Specific types of spatial defects or potentials can turn monolayer graphene into a topological material. These are classified by dimension $D$ and they systematically obtained from the Hamiltonian means its symbol $\mathcal{H}(\mathbit{k},\mathbit{r})$, an operator which generalizes Bloch contains all information. This approach, when applied to Dirac operators, allows recover tenfold classification insulators superconductors. The existence stable $\mathbb{Z}$ topology is predicted as condition on $D$, similar in thermodynamic phase transitions. Kekule distortions, vacancies, adatoms proposed examples such their equivalence discussed.

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ژورنال

عنوان ژورنال: Physical review

سال: 2023

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.108.054101