Stability of multielectron bubbles in high Landau levels

Article

关键词: STATE PHASE-DIAGRAM;    2-DIMENSIONAL ELECTRON LIQUID;    CHARGE-DENSITY-WAVE;    GROUND-STATE;    2D ELECTRONS;   

DOI  :  10.1103/PhysRevB.102.115303

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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