259 citations · 1.9k across the 61 of their papers we have counts for
4 papers · 1 filter
Disorder-Induced Multiple Transition involving Z2 Topological Insulator
Ai Yamakage, Kentaro Nomura, Ken-Ichiro Imura +1
Effects of disorder on two-dimensional Z2 topological insulator are studied numerically by the transfer matrix method. Based on the scaling analysis, the phase diagram is derived f…
Mesoscopic spin Hall effect along a potential step in graphene
Ai Yamakage, Ken-Ichiro Imura, Jérôme Cayssol +1
We consider a straight one-dimensional potential step created across a graphene flake. Charge and spin transport through such a potential step are studied in the presence of both i…
Analytic Theory of Edge Modes in Topological Insulators
Shijun Mao, Yoshio Kuramoto, Ken-Ichiro Imura +1
Spectrum and wave function of gapless edge modes are derived analytically for a tight-binding model of topological insulators on square lattice. Particular attention is paid to dep…
Zigzag edge modes in Z2 topological insulator: reentrance and completely flat spectrum
Ken-Ichiro Imura, Ai Yamakage, Shijun Mao +2
The spectrum and wave function of helical edge modes in Z_2 topological insulator are derived on a square lattice using Bernevig-Hughes-Zhang (BHZ) model. The BHZ model is characte…