Shi Junren, Xie X C
Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Phys Rev Lett. 2003 Aug 22;91(8):086801. doi: 10.1103/PhysRevLett.91.086801. Epub 2003 Aug 21.
We demonstrate that the radiation-induced "zero-resistance state" observed in a two-dimensional electron gas is a result of the nontrivial structure of the density of states of the systems and the photon-assisted transport. A toy model of a quantum tunneling junction with oscillatory density of states in leads catches most of the important features of the experiments. We present a generalized Kubo-Greenwood conductivity formula for the photon-assisted transport in a general system and show essentially the same nature of the transport anomaly in a uniform system.
我们证明，在二维电子气中观察到的辐射诱导“零电阻状态”是系统态密度的非平凡结构和光子辅助输运的结果。引线中具有振荡态密度的量子隧穿结的简化模型捕捉到了实验的大部分重要特征。我们给出了一般系统中光子辅助输运的广义久保-格林伍德电导率公式，并表明均匀系统中输运异常的本质相同。
