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Two- and three-electron bubbles in Al<sub>x</sub>Ga<sub>1−x</sub>As/Al<sub>0.24</sub>Ga<sub>0.76</sub>As quantum wells

POSTER

Abstract

We report on transport signatures of eight distinct bubble phases in the N = 3 Landau level of an AlxGa1−xAs/Al0.24Ga0.76As quantum well with x = 0.0015. These phases occur near partial filling factors ν� ≈ 0.2 (0.8) and ν� ≈ 0.3 (0.7) and have M = 2 and M = 3 electrons (holes) per bubble, respectively. We speculate that a small amount of alloy disorder in our sample helps to distinguish these broken symmetry state in low-temperature transport measurements.

Presenters

  • Xiaojun Fu

    University of Minnesota

Authors

  • Xiaojun Fu

    University of Minnesota

  • Qianhui Shi

    Columbia Univ, Columbia University, University of Minnesota

  • Michael Zudov

    University of Minnesota

  • Geoff C Gardner

    Purdue University, Birck Nanotechnology Center and Microsoft Quantum Purdue, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Microsoft Quantum Purdue, Purdue University, West Lafayette, Indiana 47907, USA, Microsoft Quantum Purdue, Department of Physics and Astronomy, Microsoft Quantum Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Physics, Purdue University

  • John Watson

    Purdue University

  • Michael Manfra

    Physics and Astronomy, Purdue Univ, Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, School of Materials Engineering, School of Electrical and Computer Engineering, Purdue, Purdue Univ, Purdue University, Microsoft Quantum at Station Q Purdue, Department of Physics and Astronomy, Birck Nanotechnology Center, Microsoft Quantum Purdue, School og Materials Engineering & School of Electrical and Computer Engineering, P, Physics and Astronomy, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy and Microsoft Quantum Purdue, Purdue University, West Lafayette, Indiana 47907 USA, Department of Physics and Astronomy, PURDUE UNIVERSITY, Department of Physics and Astronomy, Microsoft Quantum Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Physics, Purdue University