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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…
Universal phase transition and band structures for spinless nodal-line and Weyl semimetals
Ryo Okugawa, Shuichi Murakami
We study a general phase transition between spinless topological nodal-line semimetal and Weyl semimetal phases. We classify topological nodal lines into two types based on their p…
Orbital Edelstein effect as a condensed-matter analog of solenoid
Taiki Yoda, Takehito Yokoyama, Shuichi Murakami
We theoretically study current-induced orbital magnetization in a chiral crystal. This phenomenon is an orbital version of the Edelstein effect. We propose an analogy between the c…
Spinless hourglass nodal-line semimetals
Ryo Takahashi, Motoaki Hirayama, Shuichi Murakami
Nodal-line semimetals, one of the topological semimetals, have degeneracy along nodal lines where the band gap is closed. In many cases, the nodal lines appear accidentally, and in…
Topological Phases in a Weyl Semimetal Multilayer
Kazuki Yokomizo, Shuichi Murakami
We investigate multilayer systems of a normal insulator and a Weyl semimetal. We calculate the bulk band structure and determine phase diagrams by changing the thickness of the nor…