108 citations · 471 across the 6 of their papers we have counts for
7 papers
Boundary criticality at the Anderson transition between a metal and a quantum spin Hall insulator in two dimensions
Hideaki Obuse, Akira Furusaki, Shinsei Ryu +1
Static disorder in a noninteracting gas of electrons confined to two dimensions can drive a continuous quantum (Anderson) transition between a metallic and an insulating state when…
Quantum Hall Effect of Massless Dirac Fermions in a Vanishing Magnetic Field
Kentaro Nomura, Shinsei Ryu, Mikito Koshino +2
The effect of strong long-range disorder on the quantization of the Hall conductivity in graphene is studied numerically. It is shown that increasing Landau-level mixing p…
Electron fractionalization for two-dimensional Dirac fermions
Claudio Chamon, Chang-Yu Hou, Roman Jackiw +3
Fermion-number fractionalization without breaking of time-reversal symmetry was recently demonstrated for a field theory in -dimensional space and time that describes the co…
Irrational vs. rational charge and statistics in two-dimensional quantum systems
Claudio Chamon, Chang-Yu Hou, Roman Jackiw +3
We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-biding systems described, in the continuum approximation, by the Dir…
Z2 topological term, the global anomaly, and the two-dimensional symplectic symmetry class of Anderson localization
Shinsei Ryu, Christopher Mudry, Hideaki Obuse +1
We discuss, for a two-dimensional Dirac Hamiltonian with random scalar potential, the presence of a topological term in the non-linear sigma model encoding the physics of And…
Two-dimensional spin-filtered chiral network model for the Z_2 quantum spin-Hall effect
Hideaki Obuse, Akira Furusaki, Shinsei Ryu +1
The effects of static disorder on the Z_2 quantum spin-Hall effect for non-interacting electrons propagating in two-dimensional space is studied numerically. A two-dimensional time…