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@ARTICLE{Luftner:201044,
      author       = {Luftner, D. and Ules, T. and Reinisch, E. M. and Koller, G.
                      and Subach, Sergey and Tautz, Frank Stefan and Ramsey, M. G.
                      and Puschnig, P.},
      title        = {{I}maging the wave functions of adsorbed molecules},
      journal      = {Proceedings of the National Academy of Sciences of the
                      United States of America},
      volume       = {111},
      number       = {2},
      issn         = {1091-6490},
      address      = {Washington, DC},
      publisher    = {National Acad. of Sciences},
      reportid     = {FZJ-2015-03354},
      pages        = {605 - 610},
      year         = {2014},
      abstract     = {The basis for a quantum-mechanical description of matter is
                      electron wave functions. For atoms and molecules, their
                      spatial distributions and phases are known as orbitals.
                      Although orbitals are very powerful concepts, experimentally
                      only the electron densities and -energy levels are directly
                      observable. Regardless whether orbitals are observed in real
                      space with scanning probe experiments, or in reciprocal
                      space by photoemission, the phase information of the orbital
                      is lost. Here, we show that the experimental momentum maps
                      of angle-resolved photoemission from molecular orbitals can
                      be transformed to real-space orbitals via an iterative
                      procedure which also retrieves the lost phase information.
                      This is demonstrated with images obtained of a number of
                      orbitals of the molecules pentacene (C22H14) and
                      perylene-3,4,9,10-tetracarboxylic dianhydride (C24H8O6),
                      adsorbed on silver, which are in excellent agreement with ab
                      initio calculations. The procedure requires no a priori
                      knowledge of the orbitals and is shown to be simple and
                      robust.},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {000},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000329614500023},
      pubmed       = {pmid:24344291},
      doi          = {10.1073/pnas.1315716110},
      url          = {https://juser.fz-juelich.de/record/201044},
}