• Featured in Physics
  • Editors' Suggestion

Optical Probing of the Spin Polarization of the ν=5/2 Quantum Hall State

M. Stern, P. Plochocka, V. Umansky, D. K. Maude, M. Potemski, and I. Bar-Joseph
Phys. Rev. Lett. 105, 096801 – Published 23 August 2010
Physics logo See Viewpoint: The 5/2 enigma in a spin?

Abstract

We apply polarization resolved photoluminescence spectroscopy to measure the spin polarization of a two dimensional electron gas in perpendicular magnetic field. We find that the splitting between the σ+ and σ polarizations exhibits a sharp drop at ν=5/2 and is equal to the bare Zeeman energy, which resembles the behavior at even filling factors. We show that this behavior is consistent with filling factor ν=5/2 being unpolarized.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 17 May 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.096801

© 2010 The American Physical Society

Viewpoint

Key Image

The 5/2 enigma in a spin?

Published 23 August 2010

Theorists and experimentalists have long been trying to explain the existence of a fractional quantum Hall effect where it is not expected.

See more in Physics

Authors & Affiliations

M. Stern1,*, P. Plochocka2, V. Umansky1, D. K. Maude2, M. Potemski2, and I. Bar-Joseph1

  • 1Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot, Israel
  • 2Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, Grenoble, France

  • *mstern@weizmann.ac.il

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 105, Iss. 9 — 27 August 2010

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
×