Semimetallic carbon allotrope with topological nodal line in mixed $s{p}^2$-$s{p}^3$ bonding networks

Ha-Jun Sung, Sunghyun Kim, In-Ho Lee +1

Graphene is known as a two-dimensional Dirac semimetal, in which electron states are described by the Dirac equation of relativistic quantum mechanics. Three-dimensional analogues…