Radiation-Induced "Zero-Resistance State" and the Photon Assisted Transport

Details Radiation-Induced "Zero-Resistance State" and the Photon Assisted Transport Radiation-Induced "Zero-Resistance State" and the Photon Assisted Transport

2003-02-19

arxiv.org/abs/cond-mat/0302393v3

Phys. Rev. Lett. 91, 086801 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. Please send comment to shij@ornl.gov. This version added a paragraph to discuss the implication of negativ

Scientific paper

10.1103/PhysRevLett.91.086801

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.

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