论文标题
用于精确控制氦气上的电子精确控制的压电
Piezoacoustics for precision control of electrons floating on helium
论文作者
论文摘要
压电表面声波（锯）非常有力地研究和控制冷凝物质中的基本和集体激发。在半导体中，二维电子系统已用于揭示电子状态的空间和时间结构，产生量化的电荷泵送以及传递量子信息。与半导体相反，被困在超高氦表面上方的电子形成了超高的迁移率，二维电子系统是强烈相互交互的库仑液体和固态，这些液态和固态表现出非平凡的空间结构和锯基实验的时间动力学。在这里，我们报告了电子在氦气上的耦合与逃生的压电锯。我们证明了高达〜0.01％的电子的精确大副传输，打开了未来量化的电荷泵送实验的大门。我们还显示，锯是研究电子液体和氦气上电子相的集体激发的高频动力学反应和松弛过程的途径。
Piezoelectric surface acoustic waves (SAWs) are powerful for investigating and controlling elementary and collective excitations in condensed matter. In semiconductor two-dimensional electron systems SAWs have been used to reveal the spatial and temporal structure of electronic states, produce quantized charge pumping, and transfer quantum information. In contrast to semiconductors, electrons trapped above the surface of superfluid helium form an ultra-high mobility, two-dimensional electron system home to strongly-interacting Coulomb liquid and solid states, which exhibit non-trivial spatial structure and temporal dynamics prime for SAW-based experiments. Here we report on the coupling of electrons on helium to an evanescent piezoelectric SAW. We demonstrate precision acoustoelectric transport of as little as ~0.01% of the electrons, opening the door to future quantized charge pumping experiments. We also show SAWs are a route to investigating the high-frequency dynamical response, and relaxational processes, of collective excitations of the electronic liquid and solid phases of electrons on helium.
