Superballistic flow of viscous electron fluid induced by microwave irradiation in quantum point contact

• DOI: 10.48550/arxiv.2403.01743
• Publication Date: 2024-03-04
• Authors: Xinghao Wang; Wenfeng Zhang; Rui-Rui Du; L. N. Pfeiffer; K. W. Baldwin; K. W. West
• Keywords: Electron flow

We measure the resistance oscillation of quantum point contact (QPC) under microwave (MW) radiation. What is different from common induced by edge magnetoplasmon (EMP) that at lower magnetic field ({\omega}>{\omega}_c), photoconductance positive (negative) with weak (strong) MW This transport phenomenon proved to be related superballistic flow electrons through QPC. The distinction between regions {\omega}>{\omega}_c and {\omega}<{\omega}_c attributed absorption rate Violent occurs when cyclotron orbits or current domains are destroyed in QPC region.