Published in:
Physical Review B 77,1 (2008) 014505;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevB.77.014505
Abstract
We consider tunneling of vortices across a superconducting film that is both narrow and short (and connected to bulk superconducting leads at the ends). We find that in the superconducting state the resistance, at low values of the temperature (T) and current, does not follow the power-law dependence on T characteristic of longer samples but is exponential in 1/T. The coefficient of 1/T in the exponent depends on the length or, equivalently, the total normal-state resistance of the sample. These conclusions persist in the one-dimensional limit, which is similar to the problem of quantum phase slips in an ultranarrow short wire.
Keywords
Physics, Condensed Matter
Date of this Version
January 2008