Weyl-Superconductivity revealed by Edge Mode mediated Nonlocal Transport

Wenyao Liu; Gabriel Natale; Camron Farhang; Michael Geiwitz; Kewen Huang; Qishuo Tan; Xingyao Guo; Mason Gray; Vincent Lamberti; Jazzmin Victorin; Huairuo Zhang; James L. Hart; Vsevolod Belosevich; Xi Ling; Qiong Ma; Wan Kyu Park; Kenji Watanabe; Takashi Taniguchi; Judy J. Cha; Albert V. Davydov; Kin Chung Fong; Ethan Arnault; Genda Gu; Rui-Xing Zhang; Enrico Rossi; Jing Xia; Kenneth S. Burch

arXiv · 2507.01108

Weyl-Superconductivity revealed by Edge Mode mediated Nonlocal Transport

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Abstract

Topological superconductivity (TSC) hosts exotic modes enabling error-free quantum computation and low-temperature spintronics. Despite preliminary evidence of edge modes, unambiguous signatures remain undetected. Here, we report the first observation of protected, non-local transport from the edge modes of the potential Weyl-superconductor \ch{FeTe_{0.55}Se_{0.45}}. Namely resonant charge injection, ballistic transport, and extraction via edge modes. An anomalous conductance plateau emerges only when topological, superconducting, and magnetic phases coexist, with source-drain contacts coupled via the edge. Moving the drain to the bulk switches the non-local transport process to a local Andreev process, generating a zero-bias conductance peak (ZBCP). The edge mode's topological protection is confirmed by its insensitivity to external magnetic fields and increasing temperatures until the spontaneous magnetization is substantially suppressed. Our findings provide a new methodology to demonstrate TSC edge states in \ch{FeTe_{0.55}Se_{0.45}} via topologically protected non-local transport.

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Wenyao Liu, Gabriel Natale, Camron Farhang, Michael Geiwitz, Kewen Huang, Qishuo Tan, Xingyao Guo, Mason Gray, Vincent Lamberti, Jazzmin Victorin, Huairuo Zhang, James L. Hart, Vsevolod Belosevich, Xi Ling, Qiong Ma, Wan Kyu Park, Kenji Watanabe, Takashi Taniguchi, Judy J. Cha, Albert V. Davydov, Kin Chung Fong, Ethan Arnault, Genda Gu, Rui-Xing Zhang, Enrico Rossi, Jing Xia, Kenneth S. Burch. 2025-07-01. Weyl-Superconductivity revealed by Edge Mode mediated Nonlocal Transport. https://arxiv.org/abs/2507.01108

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