Universal scaling behavior of the upper critical field in strained FeSe0.7Te0.3 thin films

Yuan F, Grinenko V, Iida K, Richter S, Pukenas A, Skrotzki W, Sakoda M, Naito M, Sala A, Putti M, Yamashita A, Takano Y, Shi Z, Nielsch K, Huehne R (2018)

Publication Type: Journal article

Publication year: 2018

Journal

New Journal of Physics Institute of Physics: Open Access Journals / Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft

Book Volume: 20

Article Number: 093012

Journal Issue: 9

DOI: 10.1088/1367-2630/aade66

Abstract

Revealing the universal behaviors of iron-based superconductors (FBS) is important to elucidate the microscopic theory of superconductivity. In this work, we investigate the effect of in-plane strain on the slope of the upper critical field H c2 at the superconducting transition temperature T c (i.e. -dH c2/dT) for FeSe0.7Te0.3 thin films. The in-plane strain tunes T c in a broad range, while the composition and disorder are almost unchanged. We show that -dH c2/dT scales linearly with T c, indicating that FeSe0.7Te0.3 follows the same universal behavior as observed for pnictide FBS. The observed behavior is consistent with a multiband superconductivity paired by interband interaction such as sign change s ± superconductivity.

Involved external institutions

Southeast University / 东南大学 CN China (CN) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Nagoya University / 名古屋大学 JP Japan (JP) Technische Universität Dresden DE Germany (DE) Tokyo University of Agriculture & Technology (TUAT) / 東京農工大学 JP Japan (JP) University of Genova / Università degli Studi di Genova IT Italy (IT) National Institute of Materials Science (NIMS) JP Japan (JP)

How to cite

APA:

Yuan, F., Grinenko, V., Iida, K., Richter, S., Pukenas, A., Skrotzki, W.,... Huehne, R. (2018). Universal scaling behavior of the upper critical field in strained FeSe0.7Te0.3 thin films. New Journal of Physics, 20(9). https://doi.org/10.1088/1367-2630/aade66

MLA:

Yuan, Feifei, et al. "Universal scaling behavior of the upper critical field in strained FeSe0.7Te0.3 thin films." New Journal of Physics 20.9 (2018).

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