Electron Arrays in Two Dimensions

计划进行重要的新实验，以进一步阐明研究人员在二维电子层熔化过程中发现的六方相的性质。我们将检验电子-涟漪相互作用的理论，在这个系统中寻找极化子态，并研究激光在电子凹陷中的布拉格散射。虽然在晶相中电子速度足够大，不会形成韧窝，但在位错密度较小的六方相中可能会形成韧窝。我们将进一步研究经典电子流体中的关联。由于电子在电场中运动时氦表面的一个小尾迹为通过这种电子-涟漪耦合模式的电子-电子配对提供了一个有吸引力的势，因此我们将在这一层中寻找二维超导电性。

Significant new experiments are planned to further elucidate the nature of the hexatic phase that the investigator identifies in the melting of the two-dimensional electron layer. Theories of the electron-ripplon interaction will be tested, the polaron state will be looked for in this system, and Bragg scattering of laser light from the electron dimples will be studied. Although in the crystal phase the electron velocity is large enough that the dimples don't form, the possibility exists that the dimples can form in the hexatic phase where the density of dislocations is small. Further study of the correlations in the classical electron fluid will be made. A search will be made for two- dimensional superconductivity in this layer since a small wake in the helium surface as an electron moves in an electric field provides an attractive potential for electron-electron pairing via this electron-ripplon coupling mode.