Atomic-scale insights into the origin of rectangular lattice in nanographene probed by scanning tunneling microscopy

Li, Junhuan; Li, Shaoxian; Higashi, Tomoki et al.

Physical Review B, 2021, 103(24), 245433-1-245433-9

Number of Access:790（2025-08-13 22:21 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/83924

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Title
Atomic-scale insights into the origin of rectangular lattice in nanographene probed by scanning tunneling microscopy
Creator
CreatorName
Li, Junhuan
CreatorName
Li, Shaoxian
CreatorName
Higashi, Tomoki
NRID
1000090514464 1000090514464
CreatorName
Kawai, Kentaro
NRID
1000090514464 1000090514464
CreatorName
Inagaki, Kouji
NRID
1000060240074 1000060240074
researchmap permalink
read0014013 read0014013
Scopus Author ID
7201754767 7201754767
CreatorName
Yamamura, Kazuya
NRID
1000010324807 1000010324807
ORCID
0000-0003-2030-8291 0000-0003-2030-8291
researchmap permalink
read0054777 read0054777
Scopus Author ID
57197794262 57197794262
CreatorName
Arima, Kenta
Description
Li J., Li S., Higashi T., et al. Atomic-scale insights into the origin of rectangular lattice in nanographene probed by scanning tunneling microscopy. Physical Review B, 103(24), 245433 2021. Copyright 2021 by the American Physical Society.
Abstract
We conducted atomic-scale scanning tunneling microscopy of a graphene nanosheet on graphite. In addition to a rhombus lattice representing the (3×3)R30∘ superstructure, we resolved another quadrangle lattice similar to a rectangle in the sheet. Its lattice size was approximately 0.37×0.22nm2. To clarify the origin of this unique rectangular lattice, the overlap of the 3×3 superstructures along the direction of their long diagonals was theoretically examined using a simple model. The electron distribution with high energy in the occupied states of armchair-edged graphene nanoribbons (AGNRs) was calculated based on first principles. A rectangular lattice, resembling the one observed experimentally, was found to form on the AGNR under a specific width condition. This finding was also analyzed in terms of Clar's theory and the scattering of electron waves. We propose that wrinkles and adsorbates in graphene play a role similar to an armchair edge, resulting in the 3×3 phase. If these local defects are in close proximity, the rhombus phases interact to generate electronic structures predicted for AGNRs. This is probably the reason why a rectangular lattice was imaged on the graphene sheet that is not an ideal AGNR.
Publisher
American Physical Society
Source Title
Physical Review B
Volume (Issue)
103(24)
Page
245433-1-245433-9
Date of Issued
2021-06-24
Language
English
Handle URL
https://hdl.handle.net/11094/83924
PISSN
24699950
eISSN
24699969
NCID
AA11187113
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1103/physrevb.103.245433
Access Rights
open access
CopyRight
Copyright 2021 by the American Physical Society.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article