Topological Nodal-Net Semimetal in a Graphene Network Structure

Jian Tao Wang, Simin Nie, Hongming Weng, Yoshiyuki Kawazoe, Changfeng Chen

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

Topological semimetals are characterized by the nodal points in their electronic structure near the Fermi level, either discrete or forming a continuous line or ring, which are responsible for exotic properties related to the topology of bulk bands. Here we identify by ab initio calculations a distinct topological semimetal that exhibits nodal nets comprising multiple interconnected nodal lines in bulk and have two coupled drumheadlike flat bands around the Fermi level on its surface. This nodal net semimetal state is proposed to be realized in a graphene network structure that can be constructed by inserting a benzene ring into each C-C bond in the bct-C4 lattice or by a crystalline modification of the (5,5) carbon nanotube. These results expand the realm of nodal manifolds in topological semimetals, offering a new platform for exploring novel physics in these fascinating materials.

Original languageEnglish
Article number026402
JournalPhysical review letters
Volume120
Issue number2
DOIs
Publication statusPublished - 2018 Jan 12

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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