Monoclinic C16: sp2-sp3 hybridized nodal-line semimetal protected by PT-symmetry

Xing Feng, Quansheng Wu, Yong Cheng, Bin Wen, Qian Wang, Yoshiyuki Kawazoe, Puru Jena

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Based on first-principles calculations and Wannier tight-binding model, a three-dimensional (3D) carbon structure, named mC16, composed of interpenetrating graphene, is shown to be a topological nodal-line semimetal. The band structure calculations reveal that mC16 exhibits some exceptional properties. These include the Dirac band and band inversion around the Fermi level, and four nodal-lines in the entire Brillouin zone, symmetrically distributed on both sides of the mirror plane, and protected by the PT symmetry. In addition, the topological “drumhead-like” surface states appear on the (001) surface of mC16 and the double “drumhead-like” flat surface state emerges on the type-II (001) surface of the 3D mC16 structure. Moreover, the exotic surface Dirac points are located on the type-I (001) surface, implying that mC16 may process interesting surface transport properties. These new features make mC16 a new member in the topological carbon family, with promising novel applications in electronic device.

Original languageEnglish
Pages (from-to)527-532
Number of pages6
JournalCarbon
Volume127
DOIs
Publication statusPublished - 2018 Feb

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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