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O: Fachverband Oberflächenphysik

O 44: Low-Dimensional Systems: 2D - Theory (TT jointly with O)

O 44.2: Vortrag

Mittwoch, 2. April 2014, 09:45–10:00, BEY 81

Pure scaling operators at the integer quantum Hall plateau transition — Roberto Bondesan, •Daniel Wieczorek, and Martin Zirnbauer — Universität zu Köln, Institut für theoretische Physik, Zülpicher Straße 77, 50937 Köln

Despite considerable effort, the conformal field theory underlying the integer quantum Hall plateau transition is still not known. We circumvent the fact that conductances in the Chalker-Coddington model do not show pure scaling behaviour by introducing a new family of scattering observables corresponding to n-point functions of conformal primary fields at the plateau transition. Disorder averages of these observables correspond to lattice pure scaling operators in the supersymmetric vertex model. We also present numerical results for the multifractal spectra of 2 and 3 point functions.