Effect of ion irradiation on superconducting thin films
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866910494731796480 |
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| author | Kohopää, Katja Ronzani, Alberto Jabdaraghi, Robab Najafi Bera, Arijit Ribeiro, Mário Hazra, Dibyendu Senior, Jorden Prunnila, Mika Govenius, Joonas Lehtinen, Janne S. Kemppinen, Antti |
| author_facet | Kohopää, Katja Ronzani, Alberto Jabdaraghi, Robab Najafi Bera, Arijit Ribeiro, Mário Hazra, Dibyendu Senior, Jorden Prunnila, Mika Govenius, Joonas Lehtinen, Janne S. Kemppinen, Antti |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_11202 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Effect of ion irradiation on superconducting thin films Kohopää, Katja Ronzani, Alberto Jabdaraghi, Robab Najafi Bera, Arijit Ribeiro, Mário Hazra, Dibyendu Senior, Jorden Prunnila, Mika Govenius, Joonas Lehtinen, Janne S. Kemppinen, Antti Superconductivity 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. |
| title | Effect of ion irradiation on superconducting thin films |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2303.11202 |