Multiple interacting bilayer electron system: Magnetotransport and heat capacity measurements

E. Grivei, S. Melinte, V. Bayot, H. C. Manoharan, and M. Shayegan
Phys. Rev. B 68, 193404 – Published 12 November 2003
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Abstract

We report the fabrication, magnetotransport, and heat capacity measurements on a GaAs/AlGaAs multiple double-quantum-well heterostructure in the quantum Hall (QH) regime. Magnetotransport data reveal the existence of a correlated QH state at total Landau level filling factor νt=1. Near νt=2, we observe the nuclear contribution to the measured heat capacity of the Ga and As atoms in GaAs quantum wells. The heat capacity data indicate that Skyrmions are the lowest-energy excitations of the νt=2 ferromagnetic QH ground state.

  • Received 5 June 2003

DOI:https://doi.org/10.1103/PhysRevB.68.193404

©2003 American Physical Society

Authors & Affiliations

E. Grivei1,*, S. Melinte1,†, V. Bayot1, H. C. Manoharan2,‡, and M. Shayegan2

  • 1Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
  • 2Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA

  • *Present address: Timcal Belgium S.A., 2830 Willebroek, Belgium.
  • Corresponding author. Electronic address: melinte@dice.ucl.ac.be
  • Present address: Geballe Laboratory for Advanced Materials, Stanford, CA 94305.

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Vol. 68, Iss. 19 — 15 November 2003

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