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

X. Fu, Q. Shi, Michael Zudov, G. C. Gardner, J. D. Watson, M. J. Manfra

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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.

Original languageEnglish (US)
Article number161402
JournalPhysical Review B
Issue number16
StatePublished - Apr 3 2019


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