Strong field-matching effects in superconducting YBa2Cu3O7-{\delta}   films with vortex energy landscapes engineered via masked ion irradiation
  We have developed a masked ion irradiation technique to engineer the energy landscape for vortices in oxide superconductors. This approach associates the possibility to design the landscape geometry at the nanoscale with the unique capability to adjust depth of the energy wells for vortices. This enabled us to unveil the key role of vortex channeling in modulating the amplitude of the field matching effects with the artificial energy landscape, and to make the latter govern flux dynamics over an usually wide range of temperatures and applied fields. 
I. Swiecicki, C. Ulysse, T. Wolf, R. Bernard, N. Bergeal, J. Briatico,   G. Faini, J. Lesueur, and Javier E. Villegas
cond-mat.supr-con cond-mat.mes-hall cond-mat.mtrl-sci