Stability of multielectron bubbles in high Landau levels

We study multielectron bubble phases in the N = 2 and N = 3 Landau levels in a high mobility GaAs/AlGaAs sample. We found that the longitudinal magnetoresistance versus temperature curves in the multielectron bubble region exhibit sharp peaks, irrespective of the Landau-level index. We associate the...

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Bibliographic Details
Published in:Physical review. B 2020-09, Vol.102 (11), p.1, Article 115303
Main Authors: Ro, Dohyung, Myers, S. A., Deng, N., Watson, J. D., Manfra, M. J., Pfeiffer, L. N., West, K. W., Csáthy, G. A.
Format: Article
Language:English
Subjects:
Bubbles
Electron bubbles
Electrons
Magnetoresistance
Magnetoresistivity
Materials Science
Phases
Physics
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Summary:We study multielectron bubble phases in the N = 2 and N = 3 Landau levels in a high mobility GaAs/AlGaAs sample. We found that the longitudinal magnetoresistance versus temperature curves in the multielectron bubble region exhibit sharp peaks, irrespective of the Landau-level index. We associate these peaks with an enhanced scattering caused by thermally fluctuating domains of a bubble phase and a uniform uncorrelated electron liquid at the onset of the bubble phases. Within the N = 3 Landau level, onset temperatures of three-electron and two- electron bubbles exhibit linear trends with respect to the filling factor; the onset temperatures of three-electron bubbles are systematically higher than those of two-electron bubbles. Furthermore, onset temperatures of the two-electron bubble phases across N = 2 and N = 3 Landau levels are similar, but exhibit an offset. This offset and the dominant nature of the three-electron bubbles in the N = 3 Landau level reveals the role of the short-range part of the electron-electron interaction in the formation of the bubbles.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.102.115303