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

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

2004-03-03

arxiv.org/abs/cond-mat/0403125v1

Europhys. Lett., 66 (3), pp. 385-391 (2004)

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 3 figures

Scientific paper

10.1209/epl/i2003-10217-9

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 {\it 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.

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