The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films
Yuan F, Iida K, Grinenko V, Chekhonin P, Pukenas A, Skrotzki W, Sakoda M, Naito M, Sala A, Putti M, Yamashita A, Takano Y, Shi Z, Nielsch K, Huehne R (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 7
Article Number: 065015
Journal Issue: 6
DOI: 10.1063/1.4989566
Abstract
Epitaxial Fe(Se,Te) thin films were prepared by pulsed laser deposition on (La0.18Sr0.82)(Al0.59Ta0.41)O3 (LSAT), CaF2-buffered LSAT and bare CaF2 substrates, which exhibit an almost identical in-plane lattice parameter. The composition of all Fe(Se,Te) films were determined to be FeSe0.7Te0.3 by energy dispersive X-ray spectroscopy, irrespective of the substrate. Albeit the lattice parameters of all templates have comparable values, the in-plane lattice parameter of the FeSe0.7Te0.3 films varies significantly. We found that the superconducting transition temperature (Tc) of FeSe0.7Te0.3 thin films is strongly correlated with their a-axis lattice parameter. The highest Tc of over 19 K was observed for the film on bare CaF2 substrate, which is related to unexpectedly large in-plane compressive strain originating mostly from the thermal expansion mismatch between the FeSe0.7Te0.3 film and the substrate.
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APA:
Yuan, F., Iida, K., Grinenko, V., Chekhonin, P., Pukenas, A., Skrotzki, W.,... Huehne, R. (2017). The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films. AIP Advances, 7(6). https://doi.org/10.1063/1.4989566
MLA:
Yuan, Feifei, et al. "The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films." AIP Advances 7.6 (2017).
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