Web of Science, 高被引用文献,Density of States Scaling at the Semimetal to Metal Transition in Three Dimensional Topological InsulatorsKoji Kobayashi Tomi Ohtsuki Ken-Ichiro Imura Igor F. Herbut
Koji Kobayashi   Masaki Takagaki   Kentaro Nomura   
PHYSICAL REVIEW B 100(16) 161301(R) 2019年10月 [査読有り]
The magnetotransport properties of disordered ferromagnetic kagome layers are investigated numerically. We show that a large domain-wall magnetoresistance or negative magnetoresistance can be realized in kagome layered materials (e.g., Fe3Sn2, Co3...
Koji Kobayashi   Yuya Ominato   Kentaro Nomura   
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 87(7) 073707 2018年7月 [査読有り]
The magnetotransport properties of disordered ferromagnetic Weyl semimetals are investigated numerically. We found an extraordinarily stable and huge magnetoresistance effect in domain walls of Weyl semimetals. This effect originates from the heli...
We theoretically study the anisotropic magnetotransport in Dirac-Weyl magnetic junctions where a doped ferromagnetic Weyl semimetal is sandwiched between doped Dirac semimetals. We calculate the conductance using the Landauer formula and find that...
Regarding three-dimensional (3D) topological insulators and semimetals as a stack of constituent twodimensional (2D) topological (or sometimes nontopological) systems is a useful viewpoint. Here, we perform a comparative study of the paradigmatic ...
Koji Kobayashi   Yukinori Yoshimura   Ken-Ichiro Imura   Tomi Ohtsuki   
PHYSICAL REVIEW B 92(23) 235407 2015年12月 [査読有り]
We show how the two-dimensional (2D) topological insulator evolves, by stacking, into a strong or weak topological insulator with different topological indices, proposing a new conjecture that goes beyond an intuitive picture of the crossover from...
Koji Kobayashi, Tomi Ohtsuki, Ken-Ichiro Imura(担当:分担執筆, 範囲:Chapter 4: Topological Matter in the Absence of Translational Invariance)
Wiley-Scrivener 2019年4月9日 (ISBN:9781119407294)
Topological properties are sometimes emergent or enforced by the breaking of translational invariance. Here, in this chapter we discuss dimensional crossover of topological properties in thin films of topological insulators (TI) and Weyl semimetal...
Topological properties are sometimes emergent or enforced by the breaking of translational invariance. Here, in this chapter we discuss dimensional crossover of topological properties in thin films of topological insulators (TI) and Weyl semimetal...