Quasi-1-Dimensional Superconductivity in Highly Disordered NbN Nanowires
arXiv:1602.07932 · doi:10.1088/0957-4484/27/47/47LT02
Abstract
The topic of superconductivity in strongly disordered materials has attracted a significant attention. In particular vivid debates are related to the subject of intrinsic spatial inhomogeneity responsible for non-BCS relation between the superconducting gap and the pairing potential. Here we report experimental study of electron transport properties of narrow NbN nanowires with effective cross sections of the order of the debated inhomogeneity scales. We find that conventional models based on phase slip concept provide reasonable fits for the shape of the R(T) transition curve. Temperature dependence of the critical current follows the text-book Ginzburg-Landau prediction for quasi-one-dimensional superconducting channel Ic~(1-T/Tc)^3/2. Hence, one may conclude that the intrinsic electronic inhomogeneity either does not exist in our structures, or, if exist, does not affect their resistive state properties.
6 pages, 4 figures
References in corpus (10)
- Localization of preformed Cooper-pairs in disordered superconductors
- Nature of the superconductor-insulator transition in disordered superconductors
- Superconducting properties and Hall Effect of epitaxial NbN thin films
- Coulomb blockade and Bloch oscillations in superconducting Ti nanowires
- Determination of the Superconductor-Insulator Phase Diagram for One-Dimensional Wires
- Thermal fluctuations in superconducting nanowires
- Quantum phase slip phenomenon in ultra-narrow superconducting nanorings
- Spatially-resolved probing of a non-equilibrium superconductor
- One-dimensional resistive states in quasi-two-dimensional superconductors
- Superconductor-insulator transition in nanowires and nanowire arrays