Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102175
Title: Direct evidence of two superconducting gaps in FeSe0.5Te0.5: SnS-Andreev spectroscopy and the lower critical field
Authors: Kuzmicheva, T. E.
Kuzmichev, S. A.
Sadakov, A. V.
Muratov, A. V.
Usoltsev, A. S.
Martovitsky, V. P.
Shipilov, A. R.
Chareev, D. A.
Mitrofanova, E. S.
Pudalov, V. M.
Issue Date: 2016
Publisher: Maik Nauka-Interperiodica Publishing
Citation: Direct evidence of two superconducting gaps in FeSe0.5Te0.5: SnS-Andreev spectroscopy and the lower critical field / T. E. Kuzmicheva, S. A. Kuzmichev, A. V. Sadakov, et al. — DOI 10.1134/S0021364016240048 // JETP Letters. — 2016. — Vol. 104. — Iss. 12. — P. 852-858.
Abstract: We present direct measurements of the superconducting order parameter in nearly optimal FeSe Te single crystals with the critical temperature TC ≈ 14 K. Using the intrinsic multiple Andreev reflection effect (IMARE) spectroscopy and measurements of the lower critical field, we directly determined two superconducting gaps, ΔL ≈ 3.3−3.4 meV and ΔS ≈ 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. © 2016, Pleiades Publishing, Inc.
URI: http://hdl.handle.net/10995/102175
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85006142021
PURE ID: 1608149
b4572043-8c9f-433b-9124-8c976f02070b
ISSN: 213640
DOI: 10.1134/S0021364016240048
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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