J. Phys. IV France 09 (1999) Pr10-83-Pr10-84
Sliding charge-density waves as rough growth surfacesJ.D. Brock1, K.L. Ringland1, A.C. Finnefrock1, Y. Li1, S.G. Lemay2 and R.E. Thorne2
1 School of Applied and Engineering Physics, Cornell University, Ithaca, NY, U.S.A.
2 Department of Physics, Cornell University, Ithaca, NY, U.S.A.
Using high-resolution x-ray scattering techniques we have measured the transverse structure of the sliding charge-density wave (CDW) in NbSe3. For temperatures between 70 K and 120 K and for applied currents up to 40x the threshold current for sliding, the scattering peak for the sliding CDW is significantly broader than that for the pinned CDW, indicating that the sliding state is less correlated than the pinned state. Using scaling analysis, we show that the CDW phase roughness exponent α rises from 0.60 ± 0.10 in the pinned state to 0.80 ± 0.10 in the sliding state.
© EDP Sciences 1999