title: Quantum phase slips in superconducting nanowires.
abstract: We have measured the resistance vs temperature of more than 20 superconducting nanowires with nominal widths ranging from 10 to 22 nm and lengths from 100 nm to 1 microm. With decreasing cross-sectional areas, the wires display increasingly broad resistive transitions. The data are in very good agreement with a model that includes both thermally activated phase slips close to T(c) and quantum phase slips (QPS) at low temperatures, but disagree with an earlier model based on a critical value of R(N)/R(q). Our measurements provide strong evidence for QPS in thin superconducting wires.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: C N
authors.initials: CN
authors.lastname: Lau
authors.forename: N
authors.initials: N
authors.lastname: Markovic
authors.forename: M
authors.initials: M
authors.lastname: Bockrath
authors.forename: A
authors.initials: A
authors.lastname: Bezryadin
authors.forename: M
authors.initials: M
authors.lastname: Tinkham