Two-dimensional Dirac signature of germanene

Research output: Contribution to journalArticleAcademicpeer-review

61 Citations (Scopus)
136 Downloads (Pure)


The structural and electronic properties of germanene coated Ge 2Pt clusters have been determined by scanning tunneling microscopy and spectroscopy at room temperature. The interior of the germanene sheet exhibits a buckled honeycomb structure with a lattice constant of 4.3 Å and a buckling of 0.2 Å. The zigzag edges of germanene are reconstructed and display a 4× periodicity. The differential conductivity of the interior of the germanene sheet has a V-shape, which is reminiscent of the density of states of a two-dimensional Dirac system. The minimum of the differential conductivity is located close to the Fermi level and has a non-zero value, which we ascribe to the metallic character of the underlying Ge 2Pt substrate. Near the reconstructed germanene zigzag edges the shape of the differential conductivity changes from a V-shape to a more parabolic-like shape, revealing that the reconstructed germanene zigzag edges do not exhibit a pronounced metallic edge state.
Original languageEnglish
Article number111605
Pages (from-to)-
JournalApplied physics letters
Issue number11
Publication statusPublished - 2015


  • METIS-312948
  • IR-99806


Dive into the research topics of 'Two-dimensional Dirac signature of germanene'. Together they form a unique fingerprint.

Cite this