摘要
This article reviews the basic theoretical aspects of octagraphene, an one-atom-thick allotrope of carbon, with unusual two-dimensional(2 D) Fermi nesting, hoping to contribute to the new family of quantum materials. Octagraphene has an almost strongest sp^(2)hybrid bond similar to graphene, and has the similar electronic band structure as iron-based superconductors, which makes it possible to realize high-temperature superconductivity. We have compared various possible mechanisms of superconductivity, including the unconventional s;superconductivity driven by spin fluctuation and conventional superconductivity based on electron–phonon coupling. Theoretical studies have shown that octagraphene has relatively high structural stability. Although many 2 D carbon materials with C;carbon ring and C;carbon ring structures have been reported, it is still challenging to realize the octagraphene with pure square-octagon structure experimentally.This material holds hope to realize new 2 D high-temperature superconductivity.
作者
Jun Li
Dao-Xin Yao
李军;姚道新(State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics,Sun Yat-Sen University,Guangzhou 510275,China;Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao 066004,China)
基金
the National Key R&D Program of China(Grant Nos.2017YFA0206203 and 2018YFA0306001)
the National Natural Science Foundation of China(Grant No.11974432)
GBABRF2019A1515011337
Natural Science Foundation of Hebei Province,China(Grant No.A2021203010)
Shenzhen Institute for Quantum Science and Engineering(Grant No.SIQSE202102)
Leading Talent Program of Guangdong Special Projects。
