论文标题
单层石墨烯与超导微波腔的热自振荡
Thermal self-oscillations in monolayer graphene coupled to a superconducting microwave cavity
论文作者
论文摘要
超导谐振电路中的非线性现象在量子技术领域具有重要意义。我们在单层石墨烯薄片中观察到与钼 - rhenium超导谐振器的热自振荡。石墨烯薄片形成一个与温度依赖性抗性的耦合到谐振器的Sinis结。在泵功率和频率的某些条件下，这种非线性会导致热自振荡作为腔体传输测量中的边带出现，温度依赖性和栅极可调性很强。实验观察结果与基于热不稳定性的理论模型非常吻合。振荡边带的建模提供了一种评估低能能石墨烯样品中电子声子耦合的方法。
Nonlinear phenomena in superconducting resonator circuits are of great significance in the field of quantum technology. We observe thermal self-oscillations in a monolayer graphene flake coupled to Molybdenum-Rhenium superconducting resonator. The graphene flake forms a SINIS junction coupled to the resonator with strong temperature dependent resistance. In certain conditions of pump power and frequency, this nonlinearity leads to thermal self-oscillations appearing as sidebands in cavity transmission measurements with strong temperature dependence and gate tunability. The experimental observations fit well with theoretical model based on thermal instability. The modelling of the oscillation sidebands provides a method to evaluate electron phonon coupling in disordered graphene sample at low energies.
