Quasi One-dimensional Electron Channel Sound Current Transport Experiments Using Two-way High Stability Of The Feed Design

The study on single electron transportation induced by a high frequency surface acoustic wave (SAW) has important influence on the base theory of Physics, further development of semiconductor devices and the research of metrology. Recently, the interaction between SAW and the 2DEG in the GaAs/AlxGa1-xAs heterojunction has attracted more and more scientists' attentions.Our research team commits ourselves to the research and developing works of the single electron transport SAW parts, and to the study of the quantum acoustic current steps. The emphases of our research works are as follows: under ultra-low temperature(about 0.236K) conditions, how the frequency and power of the SAW and the source drain voltage influence the acoustic current; and the relationship between the source drain current and the split-gate voltage; and how to find the cut off voltage of the quasi-1D electron channel; and also the frequency character of the IDT in the SAW parts. Our final target is to measure and research the acoustic current which is produced by that SAW carry the electron passing through the quasi-1D electron channel at the cut off voltage of the quasi-1D electron channel, so as to research the quantum acoustic current steps of the quasi-1D electron channel.In order to do the research works above better, we must can precisely control the width of the quasi-1D channel and the cut off point, and also must precisely inspire current in the 2DEG, so we designed the 2 channel high precision and high stability voltage source, one channel can supply the minus voltage to the split-gate, and the other one can supply the offset voltage between the source and drain pole.My works in this project are as follows:1. Analyses and researches the 2 channel voltage source's functional and characteristic requirements of the experiment system of the acoustic current transport model in the quasi-1D electron channel.2. Designed and realized the hardware circuit of the 2 channel voltage source.3. Designed and realized the embedded software of the 2 channel voltage source.4. Designed the communication protocol between the PC and the MCU.5. Designed and debuged the control software used in the PC by LabVIEW, it is...