Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films
arxiv(2024)
摘要
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.
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