Field-free superconducting diode effect in layered superconductor FeSe

arXiv - PHYS - Superconductivity Pub Date : 2024-09-03 DOI:arxiv-2409.01715

Utane NagataDep. Electronic Science and Engineering, Kyoto Univ, Motomi AokiDep. Electronic Science and Engineering, Kyoto UnivCSRN-Kyoto, Akito DaidoGraduate School of Science, Kyoto Univ, Shigeru KasaharaOkayama Univ, Yuichi KasaharaGraduate School of Science, Kyoto Univ, Ryo OhshimaDep. Electronic Science and Engineering, Kyoto UnivCSRN-Kyoto, Yuichiro AndoDep. Electronic Science and Engineering, Kyoto UnivCSRN-Kyoto, Youichi YanaseCSRN-KyotoGraduate School of Science, Kyoto Univ, Yuji MatsudaGraduate School of Science, Kyoto Univ, Masashi ShiraishiDep. Electronic Science and Engineering, Kyoto UnivCSRN-Kyoto

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Abstract

The superconducting diode effect (SDE), where zero-resistance states appear nonreciprocally during current injection, is receiving tremendous interest in both fundamental and applied physics because the SDE is a novel manifestation of symmetry breaking and enables the creation of a novel diode without energy loss. In particular, magnetic-field-free SDEs have been extensively investigated because of their potential to serve as building blocks for superconducting circuit technology. In this letter, we report the field-free SDE in a layered superconductor, FeSe. Its underlying physics is clarified by systematic controlled experiments to be an interplay of a large thermoelectric response and geometrical asymmetry in FeSe. Our findings can pave a new avenue for the construction of novel material and device platforms utilizing SDEs.

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层状超导体 FeSe 中的无场超导二极管效应

超导二极管效应（SDE）是指零电阻状态在电流注入过程中不递减地出现，它在基础物理学和应用物理学领域都受到了极大的关注，因为超导二极管效应是对称性破缺的一种新表现形式，它能够在不损失能量的情况下制造出新型二极管。特别是无磁场 SDE，由于其作为超导电路技术构件的潜力而受到广泛研究。在这封信中，我们报告了层状超导体 FeSe 中的无磁场 SDE。我们通过系统控制实验阐明了其基本物理原理，即 FeSe 中的大热电响应和几何不对称的相互作用。我们的发现为利用 SDE 构建新型材料和器件平台铺平了新的道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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arXiv - PHYS - Superconductivity

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