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Nanoscale vortex pinning structures created in thin films of YBa2Cu3O7-δ using a helium ion microscope

  • Aichner, B. (Contributor)
  • Benedikt Müller (Contributor)
  • Max Karrer (Contributor)
  • Vyacheslav R. Misko (Contributor)
  • Fabienne Limberger (Contributor)
  • Kristijan Luka Mletschnig (Contributor)
  • M. Dosmailov (Contributor)
  • Johannes D. Pedarnig (Contributor)
  • Franco Nori (Contributor)
  • Reinhold Kleiner (Contributor)
  • Dieter Koelle (Contributor)
  • Lang, W. (Speaker)

Activity: Talks and presentations › Talk or oral contribution › Science to Science

Description

The focused beam of a helium ion microscope (HIM) is used to fabricate ultradense patterns of superconducting/insulating domains in thin films of YBa2Cu3O7-δ (YBCO) with unprecedented lateral resolution. Simulations of the He+ ion-target interactions [1] reveal 3-dimensional defect landscapes and allow one to determine the distribution of local critical temperatures in the material. Well-defined patterns of non-superconducting domains can be created with low blurring by focused 30 keV He+ ion irradiation. In such engineered defect patterns, Abrikosov vortices are trapped at the columnar defects as confirmed by the angular magnetic-field dependence of vortex commensurability effects [2]. Novel commensurability effects are observed in ultradense kagomé-like pinning patterns, where a competition between vortex pinning and the elastic energy of the distorted vortex lattice leads to unusual matching effects, as revealed by transport measurements and molecular-dynamic simulations [3].

References
[1] K. L. Mletschnig and W. Lang, Microelectron. Eng. 215 110982 (2019).
[2] B. Aichner, K. L. Mletschnig, B. Müller, M. Karrer, M. Dosmailov, J. D. Pedarnig, R. Kleiner, D. Koelle, and W. Lang, Low Temp. Phys. 46 331 (2020).
[3] B. Aichner, B. Müller, M. Karrer, V. Misko, F. Limberger, K. L. Mletschnig, M. Dosmailov, J. D. Pedarnig, F. Nori, R. Kleiner, D. Koelle, and W. Lang, ACS Appl. Nano Mater. 2 5108 (2019).
Period1 Sept 2020
Event title2020 Joint Conference of the Condensed Matter Divisions of EPS-CMD and RSEF-GEFES
Event typeConference
LocationMadrid, SpainShow on map
Degree of RecognitionInternational