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arXiv 2303.11202cond-mat.supr-con
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离子辐照对超导薄膜的影响

Effect of ion irradiation on superconducting thin films

Katja Kohopää, Alberto Ronzani, Robab Najafi Jabdaraghi, Arijit Bera, Mário Ribeiro, Dibyendu Hazra, Jorden Senior, Mika Prunnila, Joonas Govenius, Janne S. Leh… 展开作者

Katja Kohopää, Alberto Ronzani, Robab Najafi Jabdaraghi, Arijit Bera, Mário Ribeiro, Dibyendu Hazra, Jorden Senior, Mika Prunnila, Joonas Govenius, Janne S. Lehtinen, Antti Kemppinen

AI总结:

本研究提出氩或镓离子辐照的晶圆级后处理方法调控超导薄膜特性,测试多种超导体的性能变化并制备出均质MoSi薄膜,为超导器件研发提供新途径。

摘要:

我们展示了采用氩或镓的离子辐照作为晶圆级后处理方法,用于增加超导薄膜中的无序度。我们研究了几种广泛使用的超导体,包括单质和化合物两类。我们发现,离子辐照会提升所有测试薄膜的正常态电阻率,这有望实现对其超导特性的调控,例如向更高的动生电感方向调整。我们观察到Al和MoSi的超导转变温度有所上升,而Nb、NbN和TiN的超导转变温度则下降。在MoSi中,离子辐照还能改善两种材料的混合效果。我们成功制备出厚度均匀的非晶均质MoSi薄膜,这在超导纳米线单光子探测器等领域具有应用前景。

英文摘要:

We demonstrate ion irradiation by argon or gallium as a wafer-scale post-processing method to increase disorder in superconducting thin films. We study several widely used superconductors, both single-elements and compounds. We show that ion irradiation increases normal-state resistivity in all our films, which is expected to enable tuning their superconducting properties, for example, toward higher kinetic inductance. We observe an increase of superconducting transition temperature for Al and MoSi, and a decrease for Nb, NbN, and TiN. In MoSi, ion irradiation also improves the mixing of the two materials. We demonstrate fabrication of an amorphous and homogeneous film of MoSi with uniform thickness, which is promising, e.g., for superconducting nanowire single-photon detectors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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