1/f noise in a one-dimensional charge density wave system
Abstract
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) ~ f-γ, where γ 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.
- Publication:
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EPL (Europhysics Letters)
- Pub Date:
- May 2004
- DOI:
- 10.1209/epl/i2003-10217-9
- arXiv:
- arXiv:cond-mat/0403125
- Bibcode:
- 2004EL.....66..385S
- Keywords:
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- Condensed Matter - Disordered Systems and Neural Networks
- E-Print:
- 6 pages, 3 figures