% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Leis:909124,
      author       = {Leis, Arthur and Schleenvoigt, Michael and Moors, Kristof
                      and Soltner, Helmut and Cherepanov, Vasily and Schüffelgen,
                      Peter and Mussler, Gregor and Grützmacher, Detlev and
                      Voigtländer, Bert and Lüpke, Felix and Tautz, F. Stefan},
      title        = {{P}robing {E}dge {S}tate {C}onductance in {U}ltra‐{T}hin
                      {T}opological {I}nsulator {F}ilms},
      journal      = {Advanced quantum technologies},
      volume       = {5},
      number       = {9},
      issn         = {2511-9044},
      address      = {Weinheim},
      publisher    = {Wiley-VCH Verlag},
      reportid     = {FZJ-2022-03024},
      pages        = {2200043},
      year         = {2022},
      abstract     = {Quantum spin Hall (QSH) insulators have unique electronic
                      properties, comprising a band gap in their 2D interior and
                      1D spin-polarized edge states in which current flows
                      ballistically. In scanning tunneling microscopy (STM), the
                      edge states manifest themselves as an enhanced local density
                      of states (LDOS). However, there is a significant research
                      gap between the observation of edge states in nanoscale
                      spectroscopy, and the detection of ballistic transport in
                      edge channels which typically relies on transport
                      experiments with microscale lithographic contacts. Here,
                      few-layer films of the 3D topological insulator (BixSb)2Te3
                      are studied, for which a topological transition to a 2D
                      topological QSH insulator phase has been proposed. Indeed,
                      an edge state in the LDOS is observed within the band gap.
                      Yet, in nanoscale transport experiments with a four-tip STM,
                      two-quintuple-layer films do not exhibit a ballistic
                      conductance in the edge channels and thus no QSH edge
                      states. This demonstrates that the detection of edge states
                      in spectroscopy can be misleading with regard to the
                      identification of a QSH phase. In contrast, nanoscale
                      multi-tip transport experiments are a robust method for
                      effectively pinpointing ballistic edge channels, as opposed
                      to trivial edge states, in quantum materials.},
      cin          = {PGI-3 / PGI-9 / ZEA-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / I:(DE-Juel1)PGI-9-20110106 /
                      I:(DE-Juel1)ZEA-1-20090406},
      pnm          = {5213 - Quantum Nanoscience (POF4-521) / 5222 - Exploratory
                      Qubits (POF4-522) / DFG project 443416235 - 1D topologische
                      Supraleitung und Majorana Zustände in van der Waals
                      Heterostrukturen charakterisiert durch
                      Rastersondenmikroskopie},
      pid          = {G:(DE-HGF)POF4-5213 / G:(DE-HGF)POF4-5222 /
                      G:(GEPRIS)443416235},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000835848900001},
      doi          = {10.1002/qute.202200043},
      url          = {https://juser.fz-juelich.de/record/909124},
}