J. Phys. IV France 09 (1999) Pr10-129-Pr10-132
Phase slip scaling relationship for the 59 K and 143 K charge-density-waves in NbSe3J.P. McCarten1, T.C. Jones1, X. Wu1, J.H. Miller Jr.2, I. Pirtle2, X. Xu2, J.R. Claycomb2, J.-R. Liu2 and W.-K. Chu2
1 Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-1911, U.S.A.
2 Department of Physics and Texas Center for Superconductivity, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204-5932, U.S.A.
Selective area irradiation was used to create irradiated/unmodifïed/irradiated CDW heterostructures with well-defined interfaces on a single NbSe3 crystal. The temperature dependence of the extra voltage required for carrier conversion (phase slip voltage, Vps0) is extracted from length dependent studies. We find that the temperature dependence of Vps0 for the 143 K and 59 K CDW transitions are identical if properly scaled by the transition temperature. The Vps0 temperature dependence is not thermally activated, but contains an upper and lower temperature branch. The crossover temperature for the two branches is 0.75TP. For the 59 K CDW we observe a zero-bias resistance anomaly near a single irradiated/unmodified interface. This anomaly abruptly changes with temperature near 44 K suggesting a qualitative change in the phase slip mechanism near 0.75TP.
© EDP Sciences 1999