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

doi:10.1103/PhysRevB.99.161402

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

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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.

Original language	English (US)
Article number	161402
Journal	Physical Review B
Volume	99
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.99.161402
State	Published - Apr 3 2019

Bibliographical note

Funding Information:
We thank B. Shklovskii for discussions and G. Jones, S. Hannas, T. Murphy, J. Park, A. Suslov, and A. Bangura for technical support. 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.

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© 2019 American Physical Society.

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

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.",

author = "X. Fu and Q. Shi and Michael Zudov and Gardner, {G. C.} and Watson, {J. D.} and Manfra, {M. J.}",

note = "Funding Information: We thank B. Shklovskii for discussions and G. Jones, S. Hannas, T. Murphy, J. Park, A. Suslov, and A. Bangura for technical support. 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. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

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AU - Fu, X.

AU - Shi, Q.

AU - Zudov, Michael

AU - Gardner, G. C.

AU - Watson, J. D.

AU - Manfra, M. J.

N1 - Funding Information: We thank B. Shklovskii for discussions and G. Jones, S. Hannas, T. Murphy, J. Park, A. Suslov, and A. Bangura for technical support. 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. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/4/3

Y1 - 2019/4/3

N2 - 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.

AB - 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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ER -

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

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