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.

*The work at Minnesota (Purdue) was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, under Award No. ER 46640-SC0002567 (DE-SC0006671). A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreements No. DMR-115749 and No. DMR-1644779 and the State of Florida.

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