Volume 66, Number 3, May 2004
|Page(s)||385 - 391|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 April 2004|
noise in a one-dimensional charge density wave system
Educational Physiology Laboratory, Graduate School of Education The University of Tokyo - 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2 PRESTO, Japan Science and Technology Agency Kawaguchi, Saitama 332-0012, Japan
3 Institut für Theoretische Physik, Universität zu Köln Zülpicher Str. 77, 50937 Köln, Germany
4 Institute of Physics - Al. Lotnikow 32/46, 02-668 Warsaw, Poland
Accepted: 26 March 2004
The current noise in a classical one-dimensional charge density wave system is studied in the weak pinning regime by solving the overdamped equation of motion numerically. At low temperatures and just above the zero-temperature depinning threshold, the power spectrum of the current noise was found to scale with frequency f as , where , suggesting the existence of flicker noise. Our result is in agreement with experimental findings for quasi–one-dimensional charge density wave systems and provides the first evidence of behavior obtained from first principles.
PACS: 72.15.Nj – Collective modes (e.g., in one-dimensional conductors)
© EDP Sciences, 2004
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