Quantized ν = 5/2 State in a Two-Subband Quantum Hall System

Nübler, J.; Friess, B.; Umansky, V.; Rosenow, B.; Heiblum, M.; von Klitzing, K.; Smet, J.

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Quantized ν = 5/2 State in a Two-Subband Quantum Hall System

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von Klitzing, K.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Smet, J.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Research Group Solid State Nanophysics (Jurgen H. Smet), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Nübler, J., Friess, B., Umansky, V., Rosenow, B., Heiblum, M., von Klitzing, K., et al. (2012). Quantized ν = 5/2 State in a Two-Subband Quantum Hall System. Physical Review Letters, 108(4): 046804.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C497-A

Abstract

The evolution of the fractional quantum Hall state at filling 5/2 is studied in density tunable two-dimensional electron systems formed in wide wells in which it is possible to induce a transition from single- to two-subband occupancy. In 80 and 60 nm wells, the quantum Hall state at 5/2 filling of the lowest subband is observed even when the second subband is occupied. In a 50 nm well, the 5/2 state vanishes upon second subband population. We attribute this distinct behavior to the width dependence of the capacitive energy for intersubband charge transfer and of the overlap of the subband probability densities.