Superconductor Insulator Transition in Long MoGe Nanowires
arXiv:1204.3333 · doi:10.1103/PhysRevLett.109.027002
Abstract
Properties of one-dimensional superconducting wires depend on physical processes with different characteristic lengths. To identify the process dominant in the critical regime we have studied trans- port properties of very narrow (9-20 nm) MoGe wires fabricated by advanced electron-beam lithography in wide range of lengths, 1-25 microns. We observed that the wires undergo a superconductor -insulator transition that is controlled by cross sectional area of a wire and possibly also by the thickness-to-width ratio. Mean-field critical temperature decreases exponentially with the inverse of the wire cross section. We observed that qualitatively similar superconductor{insulator transition can be induced by external magnetic field. Some of our long superconducting MoGe nanowires can be identified as localized superconductors, namely in these wires one-electron localization length is much shorter than the length of a wire.
References in corpus (9)
- Superconductivity in one dimension
- Magnetic field enhancement of superconductivity in ultra-narrow wires
- Effects of dissipation on a quantum critical point with disorder
- Universal conductance of nanowires near the superconductor-metal quantum transition
- Determination of the Superconductor-Insulator Phase Diagram for One-Dimensional Wires
- Sharp Superconductor-Insulator Transition in Short Wires
- Stabilizing Superconductivity in Nanowires by Coupling to Dissipative Environments
- Anti-proximity Effect in Aluminum Nanowires
- Quantum phase slips in a confined geometry
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- Strong suppression of the resistivity near the transition to superconductivity in narrow micro-bridges in external magnetic fields
- Finite Size Effect in Amorphous Indium oxide
- Deficiency of the scaling collapse as an indicator of a superconductor-insulator quantum phase transition
- Growth Optimization of MoSi Thin Film and Measurement of Transport Critical Current Density of its Meander Structure