Effect of ion irradiation on superconducting thin films
Kohopää K, Ronzani A, Jabdaraghi RN, Bera A, Ribeiro M, Hazra D, Senior JL, Prunnila M, Govenius J, Lehtinen JS, Kemppinen A. 2024. Effect of ion irradiation on superconducting thin films. APL Materials. 12(7), 071101.
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Author
Kohopää, Katja;
Ronzani, Alberto;
Jabdaraghi, Robab Najafi;
Bera, Arijit;
Ribeiro, Mário;
Hazra, Dibyendu;
Senior, Jorden LISTA ;
Prunnila, Mika;
Govenius, Joonas;
Lehtinen, Janne S.;
Kemppinen, Antti
Department
Abstract
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 a higher kinetic inductance. We observe an increase in 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 the fabrication of an amorphous and homogeneous film of MoSi with uniform thickness, which is promising, for example, for superconducting nanowire single-photon detectors.
Publishing Year
Date Published
2024-07-01
Journal Title
APL Materials
Acknowledgement
We thank J. A. Sauls for useful discussions. For funding of our research project, we acknowledge the European Union’s Horizon 2020 Research and Innovation Program under Grant Agreement Nos. 862660/Quantum e-leaps, 899558/aCryComm, 766853/EFINED, and ECSEL programme 101007322/MatQu. This project has also received funding from Business Finland through Quantum Technologies Industrial (QuTI) Project No. 128291 and from Research Council of Finland through Grant Nos. 310909, 350220 and Finnish Quantum Flagship project 359284. This work was performed as part of the Research Council of Finland Centres of Excellence program (Project Nos. 336817, 336819, 352934, and 352935). We also acknowledge funding from an internal strategic innovation project of VTT related to the development of quantum computing technologies. This research was supported by the Scientific Service Units of IST Austria through resources provided by Electron Microscopy Facility. J. Senior acknowledges funding from the European Union’s Horizon 2020 Research and Innovation Program under the Marie Skłodowska-Curie Grant Agreement No. 754411. A. Ronzani acknowledges funding from Research Council of Finland (Research Fellowship Project No. 356542).
Acknowledged SSUs
Volume
12
Issue
7
Article Number
071101
eISSN
IST-REx-ID
Cite this
Kohopää K, Ronzani A, Jabdaraghi RN, et al. Effect of ion irradiation on superconducting thin films. APL Materials. 2024;12(7). doi:10.1063/5.0202851
Kohopää, K., Ronzani, A., Jabdaraghi, R. N., Bera, A., Ribeiro, M., Hazra, D., … Kemppinen, A. (2024). Effect of ion irradiation on superconducting thin films. APL Materials. AIP Publishing. https://doi.org/10.1063/5.0202851
Kohopää, Katja, Alberto Ronzani, Robab Najafi Jabdaraghi, Arijit Bera, Mário Ribeiro, Dibyendu Hazra, Jorden L Senior, et al. “Effect of Ion Irradiation on Superconducting Thin Films.” APL Materials. AIP Publishing, 2024. https://doi.org/10.1063/5.0202851.
K. Kohopää et al., “Effect of ion irradiation on superconducting thin films,” APL Materials, vol. 12, no. 7. AIP Publishing, 2024.
Kohopää K, Ronzani A, Jabdaraghi RN, Bera A, Ribeiro M, Hazra D, Senior JL, Prunnila M, Govenius J, Lehtinen JS, Kemppinen A. 2024. Effect of ion irradiation on superconducting thin films. APL Materials. 12(7), 071101.
Kohopää, Katja, et al. “Effect of Ion Irradiation on Superconducting Thin Films.” APL Materials, vol. 12, no. 7, 071101, AIP Publishing, 2024, doi:10.1063/5.0202851.
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