Quantum phase slips in superconducting nanowires

被引:300
作者
Lau, CN [1 ]
Markovic, N [1 ]
Bockrath, M [1 ]
Bezryadin, A [1 ]
Tinkham, M [1 ]
机构
[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
关键词
D O I
10.1103/PhysRevLett.87.217003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have measured the resistance vs temperature of more than 20 superconducting nanowires with nominal widths ranging from 10 to 22 mn and lengths from 100 nm to 1 mum. 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.
引用
收藏
页码:217003 / 1
页数:4
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