Author(s): Yuki Tanaka, Rinsuke Yamada, Manabu Sato, Noriyuki Kabeya, Masaki Kondo, Noriaki Kimura, Masashi Tokunaga, Motoaki Hirayama, and Max Hirschberger Realization of a three-dimensional (3D) analog of graphene has been a central challenge in topological materials science. Graphene is stabilized by covalent bonding, unlike conventional spin-orbit-type 3D Dirac semimetals (DSMs). In this study, we demonstrate the material realization of covalent-typ… [Phys. Rev. Lett. 137, 096603] Published Wed Aug 26, 2026