Europhys. Lett.
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
Europhys. Lett., 66 (3) , pp. 385-391 (2004)
DOI: 10.1209/epl/i2003-10217-9

1/f noise in a one-dimensional charge density wave system

Z. R. Struzik1, 2, A. Glatz3 and M. S. Li4

1  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

(Received 7 August 2003; accepted in final form 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 S(f) was found to scale with frequency f as $S(f) \sim f^{-\gamma}$, where $\gamma \approx
1$ , 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 1/f behavior obtained from first principles.

72.15.Nj - Collective modes (e.g., in one-dimensional conductors).

© EDP Sciences 2004