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

J. Nuebler, B. Friess, V. Umansky, B. Rosenow, M. Heiblum, K. von Klitzing, and J. Smet
Phys. Rev. Lett. 108, 046804 – Published 25 January 2012
PDFHTMLExport Citation

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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 27 September 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.046804

© 2012 American Physical Society

Authors & Affiliations

J. Nuebler1, B. Friess1, V. Umansky2, B. Rosenow3, M. Heiblum2, K. von Klitzing1, and J. Smet1,*

  • 1Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2Braun Centre for Semiconductor Research, Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
  • 3Institute for Theoretical Physics, University of Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany

  • *j.smet@fkf.mpg.de

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 108, Iss. 4 — 27 January 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×