Engineering Two-Dimensional Nodal Semimetals in Functionalized Biphenylene by Fluorine Adatoms

• DOI: 10.1021/acs.nanolett.4c00314
• Publication Date: 2024-04-12T15:01:23Z
• Authors: Seongjun Mo; Jaeuk Seo; Seok-Kyun Son; Sejoong Kim; Jun-Won Rhim; Hoonkyung Lee
• Keywords: Biphenylene; Annulene

We propose a band engineering scheme on the biphenylene network, newly synthesized carbon allotrope. illustrate that electronic structure of network can be significantly altered by controlling conditions affecting symmetry and destructive interference wave functions through periodic fluorination. First, we investigate mechanism for appearance type-II Dirac fermion in pristine network. show essential ingredients are mirror symmetries stabilization compact localized eigenstates via interference. While former is used band-crossing point along high lines, latter induces highly inclined dispersions. Subsequently, demonstrate transformation network's semimetal phase into various phases such as type-I Dirac, gapped nodal line semimetals deliberate disruption or modulation varying concentration fluorine atoms.