Two- and three-electron bubbles in AlxGa1-xAs / Al0.24Ga0.76As quantum wells

Journal article (2019)

Authors

X. Fu University of Minnesota
Q Shi Columbia University, University of Minnesota
M. A. Zudov University of Minnesota
G. C. Gardner Purdue University
J.D. Watson Purdue University, BUS/Quantum Delft
Michael J. Manfra Purdue University
Research Group
BUS/Quantum Delft
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Published Date

2019

Language

English

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Research Group

BUS/Quantum Delft

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 states in low-temperature transport measurements.

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