1/f noise in a one-dimensional charge density wave systemZ. 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 , 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 1/f behavior obtained from first principles.
72.15.Nj - Collective modes (e.g., in one-dimensional conductors).
© EDP Sciences 2004