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Эта публикация цитируется в 5 научных статьях (всего в 5 статьях)
КОНДЕНСИРОВАННОЕ СОСТОЯНИЕ
Direct evidence of two superconducting gaps in FeSe$_{0.5}$Te$_{0.5}$: SnS-Andreev spectroscopy and lower critical field
T. E. Kuzmichevaa, S. A. Kuzmichevab, A. V. Sadakova, A. V. Muratova, A. S. Usoltseva, V. P. Martovitskya, A. R. Shipilovb, D. A. Chareevcde, E. S. Mitrofanovab, V. M. Pudalova a Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
b Moscow State University, Moscow, Russia
c Kazan Federal University, Kazan, Russia
d Institute of Physics and Technology, Ural Federal University, Yekaterinburg, Russia
e Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
Аннотация:
We present direct measurements of the superconducting order parameter in nearly optimal FeSe Te single crystals with the critical temperature $T_C\approx14$ K. Using the intrinsic multiple Andreev reflection effect (IMARE) spectroscopy and measurements of the lower critical field, we directly determined two superconducting gaps, $\Delta_{\mathrm{L}}\approx 3.3$–$3.4$ meV and $\Delta S\approx 1$ meV, and their temperature dependences. We show that a twoband model fits well the experimental data. The estimated electron–boson coupling constants indicate a strong intraband and a moderate interband interaction.
Поступила в редакцию: 03.11.2016
Образец цитирования:
T. E. Kuzmicheva, S. A. Kuzmichev, A. V. Sadakov, A. V. Muratov, A. S. Usoltsev, V. P. Martovitsky, A. R. Shipilov, D. A. Chareev, E. S. Mitrofanova, V. M. Pudalov, “Direct evidence of two superconducting gaps in FeSe$_{0.5}$Te$_{0.5}$: SnS-Andreev spectroscopy and lower critical field”, Письма в ЖЭТФ, 104:12 (2016), 864; JETP Letters, 104:12 (2016), 852–858
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl5142 https://www.mathnet.ru/rus/jetpl/v104/i12/p864
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