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  • Title: Emergence of topological phases by stacking of two-dimensional lattices with nonsymmorphic symmetry.
    Author: Chiu PM, Huang CY, Li WJ, Lee TK.
    Journal: J Phys Condens Matter; 2019 Jan 23; 31(3):035501. PubMed ID: 30523842.
    Abstract:
    Topological semimetals have a variety of phases, whose Fermi surfaces can be nodal points, nodal lines and nodal loops. Here we construct four classes of 3D minimal models via vertically stacking a 2D nonsymmorphic lattice with and without breaking crystalline symmetries. As a result, four distinct topological phases can be generated in our minimal model, such as Dirac nodal line semimetals, Weyl nodal line semimetals, unconventional Weyl semimetals with topological charge [Formula: see text], and weak topological insulators. Unexpectedly, Weyl nodal loops are generated without mirror symmetry protection, where nontrivial 'drumhead' surface states emerge within the loops.
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