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@ARTICLE{Eschbach:276159,
      author       = {Eschbach, Markus and Młyńczak, Ewa and Kellner, Jens and
                      Kampmeier, Jörn and Lanius, Martin and Neumann, Elmar and
                      Weyrich, Christian and Gehlmann, Mathias and Gospodarič,
                      Pika and Döring, Sven and Mussler, Gregor and Demarina,
                      Nataliya and Luysberg, Martina and Bihlmayer, Gustav and
                      Schäpers, Thomas and Plucinski, Lukasz and Blügel, Stefan
                      and Morgenstern, Markus and Schneider, Claus M. and
                      Grützmacher, Detlev},
      title        = {{R}ealization of a vertical topological p–n junction in
                      epitaxial {S}b$_{2}${T}e$_{3}$/{B}i$_{2}${T}e$_{3}$
                      heterostructures},
      journal      = {Nature Communications},
      volume       = {6},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2015-06632},
      pages        = {8816},
      year         = {2015},
      abstract     = {Three-dimensional (3D) topological insulators are a new
                      state of quantum matter, which exhibits both a bulk band
                      structure with an insulating energy gap as well as metallic
                      spin-polarized Dirac fermion states when interfaced with a
                      topologically trivial material. There have been various
                      attempts to tune the Dirac point to a desired energetic
                      position for exploring its unusual quantum properties. Here
                      we show a direct experimental proof by angle-resolved
                      photoemission of the realization of a vertical topological
                      p–n junction made of a heterostructure of two different
                      binary 3D TI materials Bi2Te3 and Sb2Te3 epitaxially grown
                      on Si(111). We demonstrate that the chemical potential is
                      tunable by about 200 meV when decreasing the upper Sb2Te3
                      layer thickness from 25 to 6 quintuple layers without
                      applying any external bias. These results make it realistic
                      to observe the topological exciton condensate and pave the
                      way for exploring other exotic quantum phenomena in the near
                      future.},
      cin          = {IAS-1 / JARA-FIT / PGI-1 / PGI-2 / PGI-5 / PGI-6 / PGI-8-PT
                      / PGI-9},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)PGI-2-20110106 /
                      I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)PGI-6-20110106 /
                      I:(DE-Juel1)PGI-8-PT-20110228 / I:(DE-Juel1)PGI-9-20110106},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000366295500002},
      pubmed       = {pmid:26572278},
      doi          = {10.1038/ncomms9816},
      url          = {https://juser.fz-juelich.de/record/276159},
}