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Science 18 June 2004:
Vol. 304. no. 5678, pp. 1752 - 1753
DOI: 10.1126/science.1099262
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Perspectives

PHYSICS:
Cooking a Two-Dimensional Electron Gas with Microwaves

Adam C. Durst and Steven M. Girvin

Two-dimensional electron gases (2DEGs) are rich test systems for a variety of phenomena in condensed matter physics. In their Perspective, Durst and Girvin discuss a surprising new phenomenon by which the electrical resistance of a 2DEG in a magnetic field can be driven nearly all the way to zero when the system is subjected to microwave radiation. This microwave-induced zero-resistance state may correspond to a new collective state of matter, or alternatively, it may represent an exciting new example of the nonequilibrium physics of pattern formation.

The authors are in the Department of Physics, Yale University, Post Office Box 208120, New Haven, CT 06520-8120, USA. E-mail: steven.girvin{at}yale.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)