First-Principles Study for the Anisotropy of Iron-based Superconductors toward Power and Device Applications - Condensed Matter > SuperconductivityReportar como inadecuado




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Abstract: Performing the first-principles calculations, we investigate the anisotropyin the superconducting state of iron-based superconductors to gain an insightinto their potential applications. The anisotropy ratio $\gamma \lambda$ of thec-axis penetration depth to the ab-plane one is relatively small in BaFe2As2and LiFeAs, i.e., $\gamma \lambda \sim 3$, indicating that the transportapplications are promising in these superconductors. On the other hand, inthose having perovskite type blocking layers such as Sr2ScFePO3 we find a verylarge value, $\gamma \lambda \sim 200$, comparable to that in stronglyanisotropic high-Tc cuprate Bi2Sr2CaCu2O{8-\delta}. Thus, the intrinsicJosephson junction stacks are expected to be formed along the c-axis, and novelJosephson effects due to the multi-gap nature are also suggested in thesesuperconductors.



Autor: Hiroki Nakamura, Masahiko Machida JAEA, Tomio Koyama Tohoku Univ., Noriaki Hamada Tokyo Univ. of Science

Fuente: https://arxiv.org/







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