超导电性
凝聚态物理
石墨烯
材料科学
费米能级
碳纤维
电子结构
联轴节(管道)
高温超导
物理
电子
纳米技术
量子力学
复合数
冶金
复合材料
出处
期刊:Chinese Physics B
[IOP Publishing]
日期:2022-01-01
卷期号:31 (1): 017403-017403
被引量:4
标识
DOI:10.1088/1674-1056/ac40fa
摘要
Abstract This article reviews the basic theoretical aspects of octagraphene, an one-atom-thick allotrope of carbon, with unusual two-dimensional (2D) 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 2D carbon materials with C 4 carbon ring and C 8 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 2D high-temperature superconductivity.
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