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A diagnosis scheme for topological degeneracies at high-symmetry momenta
Tiantian Zhang, Ling Lu, Shuichi Murakami +3
Theories of symmetry-based indicators and topological quantum chemistry, while powerful in diagnosing gapped topological materials, cannot be directly applied to diagnosing band de…
Bulk-edge and bulk-hinge correspondence in inversion-symmetric insulators
Ryo Takahashi, Yutaro Tanaka, Shuichi Murakami
We show that a slab of a three-dimensional inversion-symmetric higher-order topological insulator (HOTI) in class A is a 2D Chern insulator, and that in class AII is a 2D top…
Appearance of hinge states in second-order topological insulators via the cutting procedure
Yutaro Tanaka, Ryo Takahashi, Shuichi Murakami
In recent years, second-order topological insulators have been proposed as a new class of topological insulators. Second-order topological insulators are materials with gapped bulk…
Pressure-induced topological phase transition in noncentrosymmetric elemental Tellurium
Toshiya Ideue, Motoaki Hirayama, Hiroaki Taiko +6
Recent progress in understanding the electronic band topology and emergent topological properties encourage us to reconsider the band structure of well-known materials including el…
Radial spin texture in elemental tellurium with chiral crystal structure
M. Sakano, M. Hirayama, T. Takahashi +18
The chiral crystal is characterized by a lack of mirror symmetry and an inversion center, resulting in the inequivalent right- and left-handed structures. In the noncentrosymmetric…
Topological semimetal phases manifested in transition metal dichalcogenides intercalated with 3d metals
Takeshi Inoshita, Motoaki Hirayama, Noriaki Hamada +2
In the search for stable topological semimetals with clean band profiles, we have screened all the 3 metal-intercalated transition-metal dichalcogenides (3dI-TMDCs) by performin…