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@ARTICLE{Terrs:828685,
      author       = {Terrés, B. and Chizhova, L. A. and Libisch, F. and Peiro,
                      J. and Jörger, D. and Engels, S. and Girschik, A. and
                      Watanabe, K. and Taniguchi, T. and Rotkin, S. V. and
                      Burgdörfer, J. and Stampfer, Christoph},
      title        = {{S}ize quantization of {D}irac fermions in graphene
                      constrictions},
      journal      = {Nature Communications},
      volume       = {7},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2017-02577},
      pages        = {11528 -},
      year         = {2016},
      abstract     = {Quantum point contacts are cornerstones of mesoscopic
                      physics and central building blocks for quantum electronics.
                      Although the Fermi wavelength in high-quality bulk graphene
                      can be tuned up to hundreds of nanometres, the observation
                      of quantum confinement of Dirac electrons in nanostructured
                      graphene has proven surprisingly challenging. Here we show
                      ballistic transport and quantized conductance of
                      size-confined Dirac fermions in lithographically defined
                      graphene constrictions. At high carrier densities, the
                      observed conductance agrees excellently with the Landauer
                      theory of ballistic transport without any adjustable
                      parameter. Experimental data and simulations for the
                      evolution of the conductance with magnetic field
                      unambiguously confirm the identification of size
                      quantization in the constriction. Close to the charge
                      neutrality point, bias voltage spectroscopy reveals a
                      renormalized Fermi velocity of ∼1.5 × 106 m s−1 in
                      our constrictions. Moreover, at low carrier density
                      transport measurements allow probing the density of
                      localized states at edges, thus offering a unique handle on
                      edge physics in graphene devices.},
      cin          = {PGI-9 / JARA-FIT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000376198500001},
      pubmed       = {pmid:27198961},
      doi          = {10.1038/ncomms11528},
      url          = {https://juser.fz-juelich.de/record/828685},
}