Can stochastic resonance and coherence resonance describe CDW dynamics in quasi-one dimensional conductors?

Jean Dumas (1) , Jacques Marcus (2)

1 NEEL - MagSup - Magnétisme et Supraconductivité
2 NEEL - AUTOCARAC - Automatisation & caractérisation

Stochastic resonance (SR) in nonlinear systems is a counterintuitive concept in which a weak periodic signal and noise cooperate and give rise to a maximum in the signal-to-noise ratio at the output of the system when the noise is tuned to a certain value. In the coherence resonance phenomenon (CR), there is no deterministic signal to be enhanced. Intrinsic oscillations are present as transients. Adding an optimum noise turns transients into coherent ones. We discuss the possible application of SR and CR concepts to CDW dynamics in quasi-one dimensional conductors. We show in a preliminary experiment that addition of white noise can modify the behavior of the CDW in the quasi-one dimensional conductor K0.30MoO3.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Jean Dumas, Jacques Marcus. Can stochastic resonance and coherence resonance describe CDW dynamics in quasi-one dimensional conductors?. Physica B: Condensed Matter, 2012, 407 (11), pp.1750-1752. ⟨10.1016/j.physb.2012.01.022⟩. ⟨hal-00990199⟩