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arXiv · 2610.36053

Proximity-Induced Giant Majorana Spin Response in a UTe$_2$-Metal Film Heterostructure

Jushin Tei·Makoto Shimizu·Yukio Tanaka·Satoshi Fujimoto·Takeshi Mizushima
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Abstract

We establish an experimentally accessible route to identifying Majorana surface states through their intrinsic Ising spin response, using UTe$_2$ as a concrete platform. The key is to extend the Majorana correlations into an adjacent metallic film via the superconducting proximity effect, thereby making the otherwise surface-localized response accessible to NMR measurements. Remarkably, disorder further sharpens the Majorana signature: impurity scattering suppresses the conventional $p$-wave proximity correlations while preserving the Majorana contribution, yielding a giant Ising-anisotropic enhancement of the NMR relaxation rate. This approach also offers a powerful means to distinguish among candidate pairing symmetries.

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Jushin Tei, Makoto Shimizu, Yukio Tanaka, Satoshi Fujimoto, Takeshi Mizushima. 2026-10-26. Proximity-Induced Giant Majorana Spin Response in a UTe$_2$-Metal Film Heterostructure. https://arxiv.org/abs/2610.36053

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