Abstract
Spectra of coupled electron–ripplon oscillation of two-dimensional (2D) Wigner crystal with the surface electron density n s=6.4×10 8 cm −2 (melting temperature of 0.58 K) are measured under conditions of both complete and noncomplete screening of the holding electric field in temperature range 0.08–0.4 K. The frequencies of the resonances are compared with the results of calculation in the frameworks of a self-consistent theory by Monarkha and Shikin. It is shown that the amplitude of the (0,1) resonance mode tends to 0 as temperature reaches the melting temperature.
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