285 citations · 1.3k across the 15 of their papers we have counts for
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Topological semimetals studied by ab initio calculations
Motoaki Hirayama, Ryo Okugawa, Shuichi Murakami
In topological semimetals such as Weyl, Dirac, and nodal-line semimetals, the band gap closes at points or along lines in k space which are not necessarily located at high-symmetry…
Topological Dirac Nodal Lines and Surface Charges in fcc Alkaline Earth Metals
Motoaki Hirayama, Ryo Okugawa, Takashi Miyake +1
In nodal-line semimetals, the gaps close along loops in space, which are not at high-symmetry points. Typical mechanisms for the emergence of nodal lines involve mirror s…
Weyl Node and Spin Texture in Trigonal Tellurium and Selenium
Motoaki Hirayama, Ryo Okugawa, Shoji Ishibashi +2
We study Weyl nodes in materials with broken inversion symmetry. We find based on first-principles calculations that trigonal Te and Se have multiple Weyl nodes near the Fermi leve…