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Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films

Authors :
Yuan, Wei
Yan, Zi-Jie
Yi, Hemian
Wang, Zihao
Paolini, Stephen
Zhao, Yi-Fan
Zhou, Ling-Jie
Wang, Annie G.
Wang, Ke
Prokscha, Thomas
Salman, Zaher
Suter, Andreas
Balakrishnan, Purnima P.
Grutter, Alexander J.
Winter, Laurel E.
Singleton, John
Chan, Moses H. W.
Chang, Cui-Zu
Publication Year :
2024

Abstract

The interface of two materials can harbor unexpected emergent phenomena. One example is interface-induced superconductivity. In this work, we employ molecular beam epitaxy to grow a series of heterostructures formed by stacking together two non-superconducting antiferromagnetic materials, an intrinsic antiferromagnetic topological insulator MnBi2Te4 and an antiferromagnetic iron chalcogenide FeTe. Our electrical transport measurements reveal interface-induced superconductivity in these heterostructures. By performing scanning tunneling microscopy and spectroscopy measurements, we observe a proximity-induced superconducting gap on the top surface of the MnBi2Te4 layer, confirming the interaction between superconductivity and antiferromagnetism in the MnBi2Te4 layer. Our findings will advance the fundamental inquiries into the topological superconducting phase in hybrid devices and provide a promising platform for the exploration of chiral Majorana physics in MnBi2Te4-based heterostructures.<br />Comment: 24 pages, 4 figures, comments are welcome

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2402.09208
Document Type :
Working Paper