Tuning the electronic structure of graphite moiré with chromium deposition: A scanning tunneling microscopy and scanning tunneling spectroscopy study

Xin Zhang; Hong Luo

doi:10.1021/jp506558j

Tuning the electronic structure of graphite moiré with chromium deposition: A scanning tunneling microscopy and scanning tunneling spectroscopy study

Xin Zhang
, Hong Luo

Physics

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The growth of chromium (Cr) on moiré patterns (MPs) on highly oriented pyrolytic graphite (HOPG) surface was studied by scanning tunneling microscopy/spectroscopy (STM/STS). At low coverage, Cr clusters can nucleate at top, bridge and hollow sites of the MP with no long-range or short-range orders. With increasing coverage, the size distribution of the Cr clusters remains constant and narrow, only the population increases. Compared to the situation before Cr deposition, the energy difference (ΔE_VHS) between the two van Hove singularities (VHSs) of the twisted HOPG surface layer is enlarged while remaining linearly proportional to the sine of the twisting angle. The distance-dependence of the ΔE_VHS enlargement, revealed by STS at extremely low Cr coverage, provides an estimate of each individual clusters ability of modifying the graphites electronic structure.

Original language	English
Pages (from-to)	20461-20465
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	35
DOIs	https://doi.org/10.1021/jp506558j
State	Published - Sep 4 2014

Access to Document

10.1021/jp506558j

Cite this

@article{5364edce38114dc69522836cfa040fd5,

title = "Tuning the electronic structure of graphite moir{\'e} with chromium deposition: A scanning tunneling microscopy and scanning tunneling spectroscopy study",

abstract = "The growth of chromium (Cr) on moir{\'e} patterns (MPs) on highly oriented pyrolytic graphite (HOPG) surface was studied by scanning tunneling microscopy/spectroscopy (STM/STS). At low coverage, Cr clusters can nucleate at top, bridge and hollow sites of the MP with no long-range or short-range orders. With increasing coverage, the size distribution of the Cr clusters remains constant and narrow, only the population increases. Compared to the situation before Cr deposition, the energy difference (ΔEVHS) between the two van Hove singularities (VHSs) of the twisted HOPG surface layer is enlarged while remaining linearly proportional to the sine of the twisting angle. The distance-dependence of the ΔEVHS enlargement, revealed by STS at extremely low Cr coverage, provides an estimate of each individual clusters ability of modifying the graphites electronic structure.",

author = "Xin Zhang and Hong Luo",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

month = sep,

day = "4",

doi = "10.1021/jp506558j",

language = "English",

volume = "118",

pages = "20461--20465",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "35",

}

TY - JOUR

T1 - Tuning the electronic structure of graphite moiré with chromium deposition

T2 - A scanning tunneling microscopy and scanning tunneling spectroscopy study

AU - Zhang, Xin

AU - Luo, Hong

PY - 2014/9/4

Y1 - 2014/9/4

N2 - The growth of chromium (Cr) on moiré patterns (MPs) on highly oriented pyrolytic graphite (HOPG) surface was studied by scanning tunneling microscopy/spectroscopy (STM/STS). At low coverage, Cr clusters can nucleate at top, bridge and hollow sites of the MP with no long-range or short-range orders. With increasing coverage, the size distribution of the Cr clusters remains constant and narrow, only the population increases. Compared to the situation before Cr deposition, the energy difference (ΔEVHS) between the two van Hove singularities (VHSs) of the twisted HOPG surface layer is enlarged while remaining linearly proportional to the sine of the twisting angle. The distance-dependence of the ΔEVHS enlargement, revealed by STS at extremely low Cr coverage, provides an estimate of each individual clusters ability of modifying the graphites electronic structure.

AB - The growth of chromium (Cr) on moiré patterns (MPs) on highly oriented pyrolytic graphite (HOPG) surface was studied by scanning tunneling microscopy/spectroscopy (STM/STS). At low coverage, Cr clusters can nucleate at top, bridge and hollow sites of the MP with no long-range or short-range orders. With increasing coverage, the size distribution of the Cr clusters remains constant and narrow, only the population increases. Compared to the situation before Cr deposition, the energy difference (ΔEVHS) between the two van Hove singularities (VHSs) of the twisted HOPG surface layer is enlarged while remaining linearly proportional to the sine of the twisting angle. The distance-dependence of the ΔEVHS enlargement, revealed by STS at extremely low Cr coverage, provides an estimate of each individual clusters ability of modifying the graphites electronic structure.

UR - https://www.scopus.com/pages/publications/84914171526

U2 - 10.1021/jp506558j

DO - 10.1021/jp506558j

M3 - Article

AN - SCOPUS:84914171526

SN - 1932-7447

VL - 118

SP - 20461

EP - 20465

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 35

ER -

Tuning the electronic structure of graphite moiré with chromium deposition: A scanning tunneling microscopy and scanning tunneling spectroscopy study

Abstract

Access to Document

Other files and links

Fingerprint

Cite this