Shu-Jen Han, Dharmendar Reddy, et al.
ACS Nano
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.
Shu-Jen Han, Dharmendar Reddy, et al.
ACS Nano
P. Alnot, D.J. Auerbach, et al.
Surface Science
E. Babich, J. Paraszczak, et al.
Microelectronic Engineering
R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics