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November 10, 2025Applied Physics LettersOpen Access

Vortex arrays and strong proximity coupling in Nb/Au bilayers

Wen-Bin Li Ivan Villani Ylea Vlamidis Matteo Carrega Letizia Ferbel Leonardo Sabattini Antonio Rossi Wen Si Stefano Veronesi Camilla Coletti Sergio Pezzini Masahiro Haze Yukio Hasegawa Stefan Heun

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Key Points

Scanning tunneling microscopy shows robust superconducting properties in thin films with gold caps, highlighting interface transparency.
Spectroscopy confirms the minigap structure in the proximitized region of Nb films covered by Au, supporting device applications.
Imaging reveals Abrikosov vortices when exposing Nb/Au bilayers to a magnetic field, emphasizing strong proximity coupling.
Protective gold layers prevent oxidation of Nb while preserving excellent superconducting traits.

Implication

Scanning tunneling microscopy reveals superconducting properties of thin films with a gold capping layer, indicating strong proximity effects.

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Cite This Study

Li et al. (2025) studied this question.

synapsesocial.com/papers/69253a31c0ce034ddc3578a8 https://doi.org/10.1063/5.0293500

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