Topological node-line semimetal in three-dimensional graphene networks

By H. Weng, Yunye Liang, Qiunan Xu, R. Yu, Z. Fang, X. Dai, Yoshiyuki Kawazoe. 2014

526 citations recorded by the source corpus.

Graphene, a two-dimensional (2D) carbon sheet, acquires many of its amazing properties from the Dirac point nature of its electronic structures with negligible spin-orbit coupling. Extending to 3D space, graphene networks with negative curvature, called Mackay-Terrones crystals (MTCs), have been proposed and experimentally explored, yet their topological properties have yet to be discovered. Based on the first-principle calculations, we report an all-carbon MTC with topologically nontrivial electronic states by exhibiting node lines in bulk. When the node lines are projected onto surfaces to form circles, ``drumhead''-like flat surface bands nestled inside of the circles are formed. The bulk node line can evolve into a 3D Dirac point in the absence of inversion symmetry, the existence of which has been shown to be plausible in recent experiments.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/983975281c53f8261914b01aee759c97521095e6

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Triple Point Topological Metals (2016, background): “nodal lines with nontrivial Berry phase, as is the case for type B, is generally associated with the appearance of surface states [26,27].”
Topological semimetals with helicoid surface states (2015, background): “[21] Hongming Weng, Yunye Liang, Qiunan Xu, Rui Yu, Zhong Fang, Xi Dai, and Yoshiyuki Kawazoe, “Topolog-”
Nodal-knot semimetals (2017, background): “There are quite a few material candidates of nodal lines: Cu3NPd and Cu3NZn[39, 40], calcium phosphide[52, 53], carbon networks[37], CaP3[54], alkali earth materials[55, 56], to name a few.”
Weyl and Dirac semimetals in three-dimensional solids (2017, background): “Huang et al., 2015a; Weng et al., 2015a predicted that TaAs,TaP, NbAs and NbP are materials in the Type I class (as discussed above) of WSM.”
Nodal-link semimetals (2017, background): “[58] Hongming Weng, Yunye Liang, Qiunan Xu, Rui Yu, Zhong Fang, Xi Dai, and Yoshiyuki Kawazoe, “Topological nodeline semimetal in three-dimensional graphene networks,” Phys.”
Unconventional mass enhancement around the Dirac nodal loop in ZrSiS (2017, background): “The advent of nodal-line semi-metals (NLSMs) [8–12], i.e. systems in which the conduction and valence bands cross each other along a closed trajectory (line or loop) inside the Brillouin zone, has opened up a new arena for the exploration of topological aspects of condensed matter that may be…”