U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
Hall-probe measurements of an YBa2Cu3O7- crystal in the range 0.11 K show a temperature-independent time-logarithmic magnetic relaxation. These results rule out conventional thermally activated flux creep, which predicts a T2/3 dependence at the lowest temperatures if one takes into account the dependence of the barrier on driving force in a simple one-dimensional model. They are consistent with a phenomenological theory assuming a quantum tunneling process for vortex kink motion. © 1991 The American Physical Society.
U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990
G. Will, N. Masciocchi, et al.
Zeitschrift fur Kristallographie - New Crystal Structures