Response of niobium-based superconducting tunnel junctions in the soft-x-ray region 0.15–6.5 keV
P. Verhoeve, N. Rando, J. Verveer, A. Peacock, A. van Dordrecht, P. Videler, M. Bavdaz, D. J. Goldie, T. Lederer, F. Scholze, G. Ulm, R. Venn
DOI 10.1103/PhysRevB.53.809 · Physical Review B
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Abstract
The response of niobium-based superconducting tunnel junctions to irradiation with monochromatic soft x rays in the energy range of 0.15–6.5 keV has been measured, using monochromatized synchrotron radiation and a Fe55 radioactive source. Nonlinearities in this response have been observed which depend on the size of the device and the thickness of the electrode in which the photon absorption takes place. The nonlinearities can be explained in terms of self-recombination of quasiparticles by means of a model based on the Rothwarf-Taylor equations. No variations in the mean energy required to produce one quasiparticle have been observed near the M and L edges of niobium. The linear dependence of the energy resolution on photon energy indicates that the resolution is dominated by spatial variations in the response of the devices. © 1996 The American Physical Society.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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