Crossover from two-dimensional to one-dimensional collective pinning in NbSe3

We have fabricated NbSe3 structures with widths comparable to the Fukuyama-Lee-Rice phase-coherence length. For samples already in the two-dimensional pinning limit, we observe a crossover from twodimensional to one-dimensional collective pinning when the crystal width is less than 1.6 mm, corresponding to the phase-coherence length in this direction. Our results show that surface pinning is negligible in our samples, and provide a means to probe the dynamics of single domains giving access to a different regime in charge-density wave physics.