Superconductivity in thin films of RuN
| Autor: | Ilin, A. S., Strugova, A. O., Cohn, I. A., Pavlovskiy, V. V., Sadakov, A. V., Sobolevskiy, O. A., Morgun, L. A., Matrovitskii, V. P., Rybalchenko, G. V., Zaitsev-Zotov, S. V. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Superconductivity has been found in RuN films obtained by reactive magnetron sputtering. This is a novel member of the metal nitride superconductors family. The critical temperature of the superconducting transition varies depending on the substrate and ranges from 0.77 K to 1.29 K. The parameters of the crystal lattice of superconducting films have been determined: the lattice is distorted cubic with parameters $a = b = c = 4.5586$ \AA , $\alpha =\beta =\gamma =87.96^\circ$. A zero temperature upper critical magnetic field $H_{c2}(0)$ and the coherence length were found from the experimental data using WHH model. $H_{c2}(0) = 2.3$ T- 4.1 T for different substrates and exceeds the upper paramagnetic limit, as well as $\xi = 12$ nm. An s-wave single band energy gap $\Delta(0) = 0.19$ meV was revealed by self-field critical current experiment at temperatures down to 10 mK, $2\Delta /kT_c =5.5$ exceeding the BCS ratio 3.5. Comment: 10 pages, 16 figures |
| Databáze: | arXiv |
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