Sliding and Nonlinear Transport in the Wigner Solid on a Liquid Helium Surface

我们对Wigner固体在液氦上的非线性输运进行了以下实验：1)Wigner固体在液氦4表面上的等离子体激元共振为了研究Wigner固体和液体表面的动力学，我们进行了等离子体共振实验。在液体He-4的初步实验中，我们观察到了所谓的耦合等离子体激元-激波激元(CPR)模式。3)超流体氦自由表面维格纳固体的电导率测量我们研制了一台铜核退磁制冷机，测量了超流体氦-3表面维格纳固体的电导率。

We have performed following experiments on the nonlinear transport of the Wigner solid on liquid Helium.1) Plasmon Resonance of the Wigner Solid on a Liquid Helium 4 SurfaceIn order to study the dynamics of the Wigner solid and the liquid surface, we have performed an experiment of the plasma resonance. In the preliminary experiment using Liquid He-4, we have observed so-called coupled plasmon-ripplon (CPR) modes. We will study the CPR resonance in the Wigner solid on the free surface of superfluid He-3.2) Conductivity Measurement of the Wigner Solid on the Free Surface of Superfluid Helium 3We have prepared a copper nuclear demagnetization refrigerator.Measurements of conductivity of the Wigner solid on a superfluid He-3 surface are underway.