Crossing-line-node semimetals: General theory and application to rare-earth trihydrides

@article{Kobayashi2017CrossinglinenodeSG,
  title={Crossing-line-node semimetals: General theory and application to rare-earth trihydrides},
  author={Shingo Kobayashi and Youichi Yamakawa and Ai Yamakage and Takumi Inohara and Yoshihiko Okamoto and Yukio Tanaka},
  journal={Physical Review B},
  year={2017},
  volume={95},
  pages={245208-245208}
}
Multiple line nodes in energy-band gaps are found in semimetals preserving mirror-reflection symmetry. We classify possible configurations of multiple line nodes with crossing points (crossing line nodes) under point-group symmetry. Taking the spin-orbit interaction (SOI) into account, we also classify topological phase transitions from crossing-line-node Dirac semimetals to other topological phases, e.g., topological insulators and point-node semimetals. This study enables one to find crossing… 
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References

SHOWING 1-10 OF 106 REFERENCES
Topological Node-Line Semimetal and Dirac Semimetal State in Antiperovskite Cu3PdN.
TLDR
It is proposed that the cubic antiperovskite material Cu3PdN can host a three-dimensional (3D) topological node-line semimetal state when spin-orbit coupling (SOC) is ignored, which is protected by the coexistence of time-reversal and inversion symmetry.
Dirac-node arc in the topological line-node semimetal HfSiS
We have performed angle-resolved photoemission spectroscopy on HfSiS, which has been predicted to be a topological line-node semimetal with square Si lattice. We found a quasi-two-dimensional Fermi
Topological nodal line semimetals predicted from first-principles calculations
Topological semimetals are newly discovered states of quantum matter, which have extended the concept of topological states from insulators to metals and attracted great research interest in recent
Line-Node Dirac Semimetal and Topological Insulating Phase in Noncentrosymmetric Pnictides CaAgX (X = P, As)
Two noncentrosymmetric ternary pnictides, CaAgP and CaAgAs, are reported as topological line-node semimetals protected solely by mirror-reflection symmetry. The band gap vanishes on a circle in
Topological semimetals and topological insulators in rare earth monopnictides
We use first principles calculations to study the electronic properties of rock salt rare earth monopnictides La$X$ ($X=$N, P, As, Sb, Bi). A new type of topological band crossing termed `linked
CaTe: a new topological node-line and Dirac semimetal
Combining first-principles calculations and effective model analysis, we predict that CaTe is a topological node-line semimetal in the absence of the spin-orbit coupling. Using a slab model, we
Topological nodal semimetals
We present a study of “nodal-semimetal” phases in which nondegenerate conduction and valence bands touch at points (the “Weyl semimetal”) or lines (the “line-node semimetal”) in three-dimensional
Topological nodal line semimetals
We review the recent, mainly theoretical, progress in the study of topological nodal line semimetals in three dimensions. In these semimetals, the conduction and the valence bands cross each other
Multi-Weyl topological semimetals stabilized by point group symmetry.
We perform a complete classification of two-band k·p theories at band crossing points in 3D semimetals with n-fold rotation symmetry and broken time-reversal symmetry. Using this classification, we
Topological Dirac nodal lines and surface charges in fcc alkaline earth metals
TLDR
It is shown via ab initio calculations that fcc calcium, strontium and ytterbium have topological nodal lines with the π Berry phase near the Fermi level, when spin–orbit interaction is neglected.
...
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