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

8 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

Fingerprint

Spectroscopy
Scanning
Defects
oscillations
Crystals
scanning
spectroscopy
occurrences
interference
conductivity
Temperature
temperature dependence
defects
crystals
Hot Temperature
energy

Keywords

  • IR-101169
  • METIS-317156

Cite this

@article{ee297b5ddf624ee1a5faeda01c3600da,
title = "Scanning tunneling spectroscopy study of the Dirac spectrum of germanene",
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.",
keywords = "IR-101169, METIS-317156",
author = "C.J. Walhout and Adil Acun and Lijie Zhang and M. Ezawa and Zandvliet, {Henricus J.W.}",
year = "2016",
doi = "10.1088/0953-8984/28/28/284006",
language = "English",
volume = "28",
pages = "284006--",
journal = "Journal of physics: Condensed matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "28",

}

Scanning tunneling spectroscopy study of the Dirac spectrum of germanene. / Walhout, C.J.; Acun, Adil; Zhang, Lijie; Ezawa, M.; Zandvliet, Henricus J.W.

In: Journal of physics: Condensed matter, Vol. 28, No. 28, 284006, 2016, p. 284006-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Scanning tunneling spectroscopy study of the Dirac spectrum of germanene

AU - Walhout, C.J.

AU - Acun, Adil

AU - Zhang, Lijie

AU - Ezawa, M.

AU - Zandvliet, Henricus J.W.

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

KW - IR-101169

KW - METIS-317156

U2 - 10.1088/0953-8984/28/28/284006

DO - 10.1088/0953-8984/28/28/284006

M3 - Article

VL - 28

SP - 284006-

JO - Journal of physics: Condensed matter

JF - Journal of physics: Condensed matter

SN - 0953-8984

IS - 28

M1 - 284006

ER -