Yang C L, Zudov M A, Knuuttila T A, Du R R, Pfeiffer L N, West K W
Department of Physics, University of Utah, Salt Lake City, UT 84112, USA.
Phys Rev Lett. 2003 Aug 29;91(9):096803. doi: 10.1103/PhysRevLett.91.096803.
Using Corbino samples we have observed oscillatory dc conductance in a high-mobility two-dimensional electron system when it is subjected to crossed microwave and magnetic fields. At the strongest of the oscillation minima the conductance is found to be vanishingly small, indicating a macroscopic insulating state associated with this minimum. With increasing voltage bias, a crossover from Ohmic to electron-heating regime is observed.
通过使用科尔比诺样品,我们观察到在高迁移率二维电子系统中,当它受到交叉微波和磁场作用时会出现振荡直流电导。在振荡最小值最强时,发现电导极小,表明与该最小值相关的宏观绝缘状态。随着电压偏置的增加,观察到从欧姆 regime 到电子加热 regime 的转变。 (注:原文中“regime”未明确具体意思,可根据上下文进一步确定准确译法,这里先保留原文。)