J. Phys. IV France 09 (1999) Pr10-317-Pr10-319
Stripe dynamics in presence of disorder and lattice potentialsC. Morais Smith1, 2, N. Hasselmann1, 3, Yu.A. Dimashko1 and A.H. Castro Neto3
1 Institut für Theoretische Physik, Universität Hamburg, 20355 Hamburg, Germany
2 Institut de Physique Théorique, Université de Fribourg, Pérolles, 1700 Fribourg, Switzerland
3 Department of Physics, University of California, Riverside, CA 92521, U.S.A.
We study the influence of disorder and lattice pinning on the dynamics of a charged stripe. Starting from a phenomenological model of a discrete quantum string, we determine the phase diagram for this system. Three regimes are identified, the free phase, the flat phase pinned by the lattice, and the disorder pinned phase. In the absence of disordered impurities, the system can be mapped onto a 1D array of Josephson junctions (JJ). The results are compared with measurements on nickelates and cuprates and a good qualitative agreement is found between our results and the experimental data.
© EDP Sciences 1999