On the self-similarity in quantum Hall systems

Details On the self-similarity in quantum Hall systems On the self-similarity in quantum Hall systems

2004-01-19

arxiv.org/abs/cond-mat/0401340v2

Europhys. Lett. 68, 72 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures; version accepted for publication in Europhys. Lett., new version contains energy calculations for collecti

Scientific paper

10.1209/epl/i2004-10215-5

The Hall-resistance curve of a two-dimensional electron system in the presence of a strong perpendicular magnetic field is an example of self-similarity. It reveals plateaus at low temperatures and has a fractal structure. We show that this fractal structure emerges naturally in the Hamiltonian formulation of composite fermions. After a set of transformations on the electronic model, we show that the model, which describes interacting composite fermions in a partially filled energy level, is self-similar. This mathematical property allows for the construction of a basis of higher generations of composite fermions. The collective-excitation dispersion of the recently observed 4/11 fractional-quantum-Hall state is discussed within the present formalism.

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