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Hidden Quantum Hall Stripes in AlxGa1xAs/Al0.24Ga0.76As Quantum Wells

X. Fu, Yi Huang (黄奕), Q. Shi, B. I. Shklovskii, M. A. Zudov, G. C. Gardner, and M. J. Manfra
Phys. Rev. Lett. 125, 236803 – Published 2 December 2020

Abstract

We report on transport signatures of hidden quantum Hall stripe (hQHS) phases in high (N>2) half-filled Landau levels of AlxGa1xAs/Al0.24Ga0.76As quantum wells with varying Al mole fraction x<103. Residing between the conventional stripe phases (lower N) and the isotropic liquid phases (higher N), where resistivity decreases as 1/N, these hQHS phases exhibit isotropic and N-independent resistivity. Using the experimental phase diagram, we establish that the stripe phases are more robust than theoretically predicted, calling for improved theoretical treatment. We also show that, unlike conventional stripe phases, the hQHS phases do not occur in ultrahigh mobility GaAs quantum wells but are likely to be found in other systems.

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  • Received 23 August 2020
  • Accepted 30 October 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.236803

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

X. Fu1, Yi Huang (黄奕)1, Q. Shi1,†, B. I. Shklovskii1, M. A. Zudov1,*, G. C. Gardner2,3, and M. J. Manfra2,3,4,5

  • 1School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 2Microsoft Quantum Lab Purdue, Purdue University, West Lafayette, Indiana 47907, USA
  • 3Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
  • 4Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
  • 5School of Electrical and Computer Engineering and School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA

  • *Corresponding author. zudov001@umn.edu
  • Present address: Department of Physics, Columbia University, New York, New York, USA.

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Issue

Vol. 125, Iss. 23 — 4 December 2020

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