Signatures of spin in the n=1/3 Fractional Quantum Hall Effect

Details Signatures of spin in the n=1/3 Fractional Quantum Hall Effect Signatures of spin in the n=1/3 Fractional Quantum Hall Effect

2005-08-17

arxiv.org/abs/cond-mat/0508393v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.74.165325

The activation gap Delta of the fractional quantum Hall state at constant filling n =1/3 is measured in wide range of perpendicular magnetic field B. Despite the full spin polarization of the incompressible ground state, we observe a sharp crossover between a low-field linear dependence of Delta on B associated to spin texture excitations and a Coulomb-like behavior at large B. From the global gap-reduction we get information about the mobility edges in the fractional quantum Hall regime.

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