M
Michael Siegel
Researcher at Karlsruhe Institute of Technology
Publications - 381
Citations - 7409
Michael Siegel is an academic researcher from Karlsruhe Institute of Technology. The author has contributed to research in topics: Josephson effect & Superconductivity. The author has an hindex of 45, co-authored 378 publications receiving 6740 citations. Previous affiliations of Michael Siegel include German National Metrology Institute & Max Planck Society.
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Dependence of magnetic penetration depth on the thickness of superconducting Nb thin films
TL;DR: In this paper, the authors present the results of a systematic study on the magnetic field penetration depth of superconducting niobium thin films and find that the reduction of the film thickness below $50\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ leads to a significant increase in the penetration depth.
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Anisotropic rare-earth spin ensemble strongly coupled to a superconducting resonator.
S. Probst,Hannes Rotzinger,Stefan Wünsch,P. Jung,Markus Jerger,Michael Siegel,Alexey V. Ustinov,Pavel Bushev +7 more
TL;DR: An on-chip cavity QED experiment with magnetically anisotropic Er(3+)∶Y2SiO5 crystals is reported on and collective strong coupling of rare-earth spins to a lumped element resonator is demonstrated.
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Optical and transport properties of ultrathin NbN films and nanostructures
A. D. Semenov,Burghardt Günther,Ute Böttger,Heinz-Wilhelm Hübers,H. Bartolf,Andreas Engel,Andreas Schilling,Konstantin Ilin,Michael Siegel,Reinhard Schneider,Dagmar Gerthsen,Nikolay A. Gippius +11 more
TL;DR: In this paper, a series of ultrathin NbN films with different thickness grown on sapphire have been evaluated by means of spectral ellipsometry and dc measurements of superconducting critical parameters.
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Spectral cut-off in the efficiency of the resistive state formation caused by absorption of a single-photon in current-carrying superconducting nano-strips
TL;DR: In this article, the supercurrent-assisted formation of resistive state in nano-structured disordered superconducting Nb(N) films after absorption of a single optical to near-infrared photon was studied.
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Current-assisted thermally activated flux liberation in ultrathin nanopatterned NbN superconducting meander structures
H. Bartolf,Andreas Engel,Andreas Schilling,Konstantin Ilin,Michael Siegel,Heinz-Wilhelm Hübers,Alexei Semenov +6 more
TL;DR: In this paper, the authors present results from an extensive study of fluctuation phenomena in superconducting nanowires made from sputtered NbN, which are fabricated in form of a meander and operated at a constant temperature.