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24 papers
Analytical solutions of topological surface states in a series of lattice models
Masaru Onoda
We derive the analytical solutions of surface states in a series of lattice models for three-dimensional topological insulators and their nontopological counterparts based on an an…
Photo-induced voltage in nano-porous gold thin film
Marjan Akbari, Masaru Onoda, Teruya Ishihara
We report an experimental study of generation of photo-induced voltage in nano-porous gold (NPG) thin film under the radiation of obliquely incident nanosecond laser light in visib…
Temperature dependent magnetotransport around = 1/2 in ZnO heterostructures
Denis Maryenko, Joseph Falson, Yusuke Kozuka +4
The sequence of prominent fractional quantum Hall states up to =5/11 around =1/2 in a high mobility two-dimensional electron system confined at oxide heterointerface (ZnO) is…
Photonic analog of graphene model and its extension -- Dirac cone, symmetry, and edge states --
Tetsuyuki Ochiai, Masaru Onoda
This paper presents a theoretical analysis on bulk and edge states in honeycomb lattice photonic crystals with and without time-reversal and/or space-inversion symmetries. Multiple…
Optical tornadoes in photonic crystals
Masaru Onoda, Tetsuyuki Ochiai
Based on an optical analogy of spintronics, the generation of optical tornadoes is theoretically investigated in two-dimensional photonic crystals without space-inversion symmetry.…
Tuning phase transition between quantum spin Hall and ordinary insulating phases
Shuichi Murakami, Satoshi Iso, Yshai Avishai +2
An effective theory is constructed for analyzing a generic phase transition between the quantum spin Hall and the insulator phases. Occurrence of degeneracies due to closing of the…