Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam

Emma Mykkänen (Corresponding Author), Arijit Bera, Janne S. Lehtinen, Alberto Ronzani, Katja Kohopää, Teresa Hönigl-decrinis, Rais Shaikhaidarov, Sebastian E. De Graaf, Joonas Govenius, Mika Prunnila

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We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and critical temperature increase as the ion dose is increased. For resistivity, the increase is almost linear, whereas critical temperature changes abruptly at the smallest doses and then remains almost constant at 4 K. We believe that our results originate from amorphization of the polycrystalline molybdenum silicide films.
Original languageEnglish
Article number950
Issue number5
Publication statusPublished - 16 May 2020
MoE publication typeA1 Journal article-refereed


This research was funded by the European Union’s Horizon 2020 research and innovation programme under grant agreements No 862660 QUANTUM E-LEAPS and No 766853 EFINED, Academy of Finland through projects ETHEC No 322580 and UQS No 310909 and Center of Excellence program No 312294, The UK department of Business, Energy and Industrial Strategy (BEIS) and EPSRC Grant Award EP/R025487/1. This work was carried out as a part of an internal strategic innovation project of VTT related to the development of quantum computing technologies.


  • superconductivity
  • focused ion beam


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