Comment on: ''Radiation-Induced ''Zero-Resistance State'' and the Photon Assisted Transport''

Details Comment on: ''Radiation-Induced ''Zero-Resistance State'' and the Photon Assisted Transport'' Comment on: ''Radiation-Induced ''Zero-Resistance State'' and the Photon Assisted Transport''

2003-02-28

arxiv.org/abs/cond-mat/0302615v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

replaced with revised version

Scientific paper

Shi and Xie [8] predicted the N-shape current-voltage characteristic $(CVC)$ for a 2DEG in a magnetic field where the zero-resistance state has been observed in recent experiments. However it is known that in the absence of a magnetic field the zero resistance state (zero differential resistance state) is achieved in a system with the S-shape $CVC$. The difference in the behaviour of systems with N- and S-shape $CVC$ was studied more than three decades ago (see for example the review [9] and references therein) and is briefly explained in this Comment. At present it is not clear whether the N-shape $CVC$ may lead to the zero resistance state in a 2DEG in a magnetic field.

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