Geometric scaling in the quantum Hall system

Details Geometric scaling in the quantum Hall system Geometric scaling in the quantum Hall system

2007-06-17

arxiv.org/abs/0706.2467v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages

Scientific paper

10.1016/j.physletb.2007.08.022

The transitions between neighbouring plateaux in the quantum Hall system are observed to follow anti-holomophic scaling with superuniversal scaling exponents, showing that the system contains an emergent sub-modular discrete symmetry and a holomorphic structure at low energies. We identify a class of effective scaling models consistent with this data, which is parametrized by the complex structure of a torus with a special spin structure, in which only the number of fermions (c) remains undetermined. For c = 2 this gives the superuniversal anti-holomorphic scaling potential previously inferred from data, with scaling exponent nu = 2.6, in reasonable agreement with available scaling data.

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