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@ARTICLE{Lyatti:827096,
      author       = {Lyatti, Matvey and Savenko, Aleksei and Poppe, Ulrich},
      title        = {{U}ltra-thin {YB}a$_{2}${C}u$_{3}${O}$_{7-x}$ films with
                      high critical current density},
      journal      = {Superconductor science and technology},
      volume       = {29},
      number       = {6},
      issn         = {0953-2048},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2017-01294},
      pages        = {065017},
      year         = {2016},
      abstract     = {Despite impressive progress in the development of
                      superconducting nanowire single-photon detectors (SNSPD),
                      the main obstacle for the widespread use of such detectors
                      is the low operating temperature required for
                      low-temperature superconductors. The very attractive idea of
                      increasing the operating temperature using high-temperature
                      superconductors for SNSPD fabrication is problematic due to
                      the insufficient quality of ultra-thin films from
                      high-temperature superconductors, which is one of the key
                      requirements for the single-photon detection by
                      superconducting nanowires. In this work, we demonstrate the
                      possibility of fabricating ultra-thin YBa2Cu3O7−x films on
                      SrTiO3 substrates with a surface flatness of ±1 unit cell
                      and a high critical current density up to 14 MA cm−2 at T
                      = 78 K. The critical current density of ultra-thin films had
                      very low value in the first three unit cell layers adjacent
                      to the substrate and reached nearly the bulk value at the
                      fifth layer. $97\%$ of the superconducting current is
                      carried by only two upper layers of a 5-unit-cell thick
                      YBa2Cu3O7−x film. Due to such superconducting current
                      distribution over the film thickness and good surface
                      flatness 5-unit-cell thick YBa2Cu3O7−x films could be
                      promising for the fabrication of single-photon detectors.},
      cin          = {PGI-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000376268900026},
      doi          = {10.1088/0953-2048/29/6/065017},
      url          = {https://juser.fz-juelich.de/record/827096},
}