2003/02/28 by Junren Shi, X. C. Xie
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.91.086801
published as Phys. Rev. Lett. 91, 086801 (2003) · 4 pages, 3 figures. Please send comment to [email protected]. This version added a paragraph to discuss the implication of negative conductance
arxiv created 2003/03/13 · arxiv updated 2009/11/30
We demonstrate that the radiation induced "zero-resistance state" observed in a two-dimensional electron gas is a result of the non-trivial structure of the density of states of the systems and the photon assisted transport. A toy model of a structureless quantum tunneling junction where the system has oscillatory density of states 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.