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@ARTICLE{Just:280918,
      author       = {Just, Sven and Blab, Marcus and Korte, Stefan and
                      Cherepanov, Vasily and Soltner, Helmut and Voigtländer,
                      Bert},
      title        = {{S}urface and {S}tep {C}onductivities on {S}i(111)
                      {S}urfaces},
      journal      = {Physical review letters},
      volume       = {115},
      number       = {6},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2016-00629},
      pages        = {066801},
      year         = {2015},
      abstract     = {Four-point measurements using a multitip scanning tunneling
                      microscope are carried out in order to determine surface and
                      step conductivities on Si(111) surfaces. In a first step,
                      distance-dependent four-point measurements in the linear
                      configuration are used in combination with an analytical
                      three-layer model for charge transport to disentangle the 2D
                      surface conductivity from nonsurface contributions. A
                      termination of the Si(111) surface with either Bi or H
                      results in the two limiting cases of a pure 2D or 3D
                      conductance, respectively. In order to further disentangle
                      the surface conductivity of the step-free surface from the
                      contribution due to atomic steps, a square four-probe
                      configuration is applied as a function of the rotation
                      angle. In total, this combined approach leads to an atomic
                      step conductivity of σstep=(29±9)  Ω−1 m−1 and
                      to a step-free surface conductivity of
                      σsurf=(9±2)×10−6  Ω−1/□ for the
                      Si(111)−(7×7) surface.},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {550},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000358937600009},
      doi          = {10.1103/PhysRevLett.115.066801},
      url          = {https://juser.fz-juelich.de/record/280918},
}