Scanning tunneling spectroscopy study of the Dirac spectrum of germanene

C.J. Walhout, Adil Acun, Lijie Zhang, M. Ezawa, Henricus J.W. Zandvliet

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)

Abstract

The temperature dependence of the density of states of germanene, synthesized on Ge/Pt crystals, has been investigated with scanning tunneling spectroscopy. After correction for thermal broadening, a virtually perfect V-shaped density of states, which is a hallmark of a two-dimensional Dirac system, has been found. In an attempt to directly measure the energy dispersion relation via quasiparticle interference we have recorded spatial maps of the differential conductivity near the edges and defects of germanene. Unfortunately, we did not find any sign of Friedel oscillations. The absence of these Friedel oscillations hints to the occurrence of Klein tunneling.
Original languageEnglish
Article number284006
Pages (from-to)284006-
JournalJournal of physics: Condensed matter
Volume28
Issue number28
DOIs
Publication statusPublished - 2016

Keywords

  • IR-101169
  • METIS-317156

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