Observations of New Dirac Points in One-Dimensionally-Rippled Graphene on Hexagonal BN Using Scanning Tunneling Spectroscopy

Won Jun Jang, Min Wook Lee, Howon Kim, Sangwoo Park, Seong Jun Jung, Sungjoo Lee, Young Jae Song, Se-Jong Kahng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Theories predicted that one-dimensional superlattice potentials in graphene would induce new Dirac points, instead of gap opening, due to lattice-induced chirality of charge carriers, but experimental evidence is rarely available in the literature. Here, we report observations of new Dirac points in one-dimensionally rippled graphene on hexagonal boron nitride (h-BN) using scanning tunneling microscopy and spectroscopy. The rippled graphene, formed due to thermal procedures, showed two new Dirac points above and below the Fermi level. The energy difference between a new Dirac point and the Fermi level was proportional to 1/L, where L was the period of a ripple, in agreement with theoretical predictions. Our study shows that the one-dimensional periodic potential is an accessible component for controlling the electronic properties of graphene.

Original languageEnglish
Pages (from-to)19535-19538
Number of pages4
JournalJournal of Physical Chemistry C
Volume119
Issue number33
DOIs
Publication statusPublished - 2015 Aug 20

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Graphite
Graphene
graphene
Spectroscopy
Scanning
scanning
Fermi level
spectroscopy
Boron nitride
Chirality
Scanning tunneling microscopy
boron nitrides
Charge carriers
ripples
chirality
Crystal lattices
Electronic properties
scanning tunneling microscopy
charge carriers
predictions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Observations of New Dirac Points in One-Dimensionally-Rippled Graphene on Hexagonal BN Using Scanning Tunneling Spectroscopy. / Jang, Won Jun; Lee, Min Wook; Kim, Howon; Park, Sangwoo; Jung, Seong Jun; Lee, Sungjoo; Song, Young Jae; Kahng, Se-Jong.

In: Journal of Physical Chemistry C, Vol. 119, No. 33, 20.08.2015, p. 19535-19538.

Research output: Contribution to journalArticle

Jang, Won Jun ; Lee, Min Wook ; Kim, Howon ; Park, Sangwoo ; Jung, Seong Jun ; Lee, Sungjoo ; Song, Young Jae ; Kahng, Se-Jong. / Observations of New Dirac Points in One-Dimensionally-Rippled Graphene on Hexagonal BN Using Scanning Tunneling Spectroscopy. In: Journal of Physical Chemistry C. 2015 ; Vol. 119, No. 33. pp. 19535-19538.
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