Exact exponents for the spin quantum Hall transition in the presence of multiple edge channels

Details Exact exponents for the spin quantum Hall transition in the presence of multiple edge channels Exact exponents for the spin quantum Hall transition in the presence of multiple edge channels

2011-09-22

arxiv.org/abs/1109.4866v2

Phys. Rev. Lett. 108, 126801 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages and 4 page supplemental material, 4 figures

Scientific paper

10.1103/PhysRevLett.108.126801

Critical properties of quantum Hall systems are affected by the presence of extra edge channels - present, in particular, at higher plateau transitions. We study this phenomenon for the case of the spin quantum Hall transition. Using supersymmetry we map the corresponding network model to a classical loop model, whose boundary critical behavior was recently determined exactly. We verify predictions of the exact solution by extensive numerical simulations.

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