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Evidence of a first order phase transition between Wigner crystal and Bubble Phases of 2D electrons in higher Landau levels

R. M. Lewis·Yong Chen·L. W. Engel·D. C. Tsui·P. D. Ye·L. N. Pfeiffer·K. W. West
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Abstract

For filling factors $ν$ in the range between 4.16 and 4.28, we simultaneously detect {\it two} resonances in the real diagonal microwave conductivity of a two--dimensional electron system (2DES) at low temperature $T \approx 35$ mK. We attribute the resonances to Wigner crystal and Bubble phases of the 2DES in higher Landau Levels. For $ν$ below and above this range, only single resonances are observed. The coexistence of both phases is taken as evidence of a first order phase transition. We estimate the transition point as $ν=4.22$.

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R. M. Lewis, Yong Chen, L. W. Engel, D. C. Tsui, P. D. Ye, L. N. Pfeiffer, K. W. West. 2004-01-23. Evidence of a first order phase transition between Wigner crystal and Bubble Phases of 2D electrons in higher Landau levels. https://doi.org/10.1103/physrevlett.93.176808

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