Rahmani, Armin, Hou, Chang-Yu, Chamon, Claudio, Affleck, Ian
Conductance is related to dynamical correlation functions that can be obtained by non-equilibrium calculations. By establishing relationships between dynamical and static correlation functions, we...
Deconfined fractional electric charges in graphene at high magnetic fields (2009)
Hou, Chang-Yu, Chamon, Claudio, Mudry, Christopher
The resistance at the charge neutral (Dirac) point was shown by Checkelsky et al in Phys. Rev. B 79, 115434 (2009) to diverge upon the application of a strong magnetic field normal to graphene. We...
Ryu, Shinsei, Mudry, Christopher, Hou, Chang-Yu, Chamon, Claudio
We classify all possible 36 gap-opening instabilities in graphene-like structures in two dimensions, i.e., masses of Dirac Hamiltonian when the spin, valley, and superconducting channels are...
Corner Junction as a Probe of Helical Edge States (2008)
Hou, Chang-Yu, Kim, Eun-Ah, Chamon, Claudio
We propose and analyze inter-edge tunneling in a quantum spin Hall corner junction as a means to probe the helical nature of the edge states. We show that electron-electron interactions in the...
Junctions of three quantum wires for spin 1/2 electrons (2008)
Hou, Chang-Yu, Chamon, Claudio
We study the effects of electron-electron interactions on the transport properties of a junction of three quantum wires enclosing a magnetic flux. The wires are modeled as single channel spin-1/2...
Electron fractionalization for two-dimensional Dirac fermions (2007)
Chamon, Claudio, Hou, Chang-Yu, Jackiw, Roman, Mudry, Christopher, Pi, So-Young, Semenoff, Gordon
Fermion-number fractionalization without breaking of time-reversal symmetry was recently demonstrated for a field theory in $(2+1)$-dimensional space and time that describes the couplings between...
Irrational vs. rational charge and statistics in two-dimensional quantum systems (2007)
Chamon, Claudio, Hou, Chang-Yu, Jackiw, Roman, Mudry, Christopher, Pi, So-Young, Schnyder, Andreas P.
We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-biding systems described, in the continuum approximation, by the Dirac equation in...
Electron fractionalization in two-dimensional graphenelike structures (2006)
Hou, Chang-Yu, Chamon, Claudio, Mudry, Christopher
Electron fractionalization is intimately related to topology. In one-dimensional systems, fractionally charged states exist at domain walls between degenerate vacua. In two-dimensional systems,...
Hou, Chang-Yu, Chamon, Claudio
We study a tunneling geometry defined by a single point-contact constriction that brings to close vicinity two points sitting at the same edge of a quantum Hall liquid, shortening the trip between...