Quantum Phase Slips and Transport in Ultrathin Superconducting Wires
Andrei D. Zaikin, Dmitrii S. Golubev, Anne van Otterlo, Gergely T. Zimányi
DOI 10.1103/PhysRevLett.78.1552 · Physical Review Letters
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Abstract
We present a microscopic study of the quantum fluctuations of the superconducting order parameter in thin homogeneous superconducting wires at all temperatures below Tc. The rate of quantum phase-slip processes determines the resistance R(T) of the wire, which is observable in very thin wires, even at low temperatures. Furthermore, we predict a new low-temperature metallic phase below a critical wire thickness in the 10-nm range, in which quantum phase slips proliferate.
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