1 research outputs found
Nonequilibrium effects in superconducting necks of nanoscopic dimensions
We have fabricated superconducting connecting necks of Pb with a scanning
tunneling microscope (STM) and studied their properties under magnetic fields
near the transition to the resistive state. A striking phenomenology is found
with two well defined conduction regimes as a function of the magnetic field.
We discuss the possible origin of this behavior in terms of the interplay
between the field dependence of the quasiparticle charge imbalance length
and the length of the neck which is superconducting under field.Comment: 11 pages, 3 figures; to be published in Physics Letters