59 citations · 236 across the 13 of their papers we have counts for
4 papers · 2 filters
Finite-size energy gap in weak and strong topological insulators
Ken-Ichiro Imura, Mayuko Okamoto, Yukinori Yoshimura +2
The non-trivialness of a topological insulator (TI) is characterized either by a bulk topological invariant or by the existence of a protected metallic surface state. Yet, in reali…
Quasiclassical Theory of the Josephson Effect in Ballistic Graphene Junctions
Yositake Takane, Ken-Ichiro Imura
The stationary Josephson effect in a system of ballistic graphene is studied in the framework of quasiclassical Green's function theory. Reflecting the ultimate two-dimensionality…
Dirac Electrons on a Sharply Edged Surface of Topological Insulators
Yositake Takane, Ken-Ichiro Imura
An unpaired gapless Dirac electron emergent at the surface of a strong topological insulator (STI) is protected by the bulk-surface correspondence and believed to be immune to back…
Perfectly conducting channel and its robustness in disordered carbon nanostructures
Yuki Ashitani, Ken-Ichiro Imura, Yositake Takane
We report our recent numerical study on the effects of dephasing on a perfectly conducting channel (PCC), its presence believed to be dominant in the transport characteristics of a…