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Peer-reviewedCC BYNano letters

Direct Observation of the Zigzag Edge States of a Supramolecular Diatomic Kagome Lattice.

  • Ryohei Nemoto1,2
  • Xiangzhi Meng3
  • Behzad Mortezapour3
  • Alexander Weismann3
  • Saya Nakano4
  • Masahisa Tsuchiizu4
  • Ryuichi Arafune1
  • Noriaki Takagi5
  • Sho Nakamura6
  • Katsunori Wakabayashi1,6
  • Rie Suizu7,8,9
  • Richard Berndt3
2 more authors
  • Takashi Uchihashi1,10
  • Kunio Awaga8,11
11 affiliations
  1. 1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki305-0044, Japan.
  2. 2Department of Physics, School of Science, Institute of Science Tokyo, 2-12-1, Ookayama, Meguro-ku, Tokyo152-8551, Japan.
  3. 3Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098Kiel, Germany.
  4. 4Department of Physics, Nara Women's University, Kitauoyanishi-machi, Nara630-8506, Japan.
  5. 5Graduate School of Human and Environmental Studies, Kyoto University, Kyoto606-8501, Japan.
  6. 6School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo669-1330, Japan.
  7. 7Synchrotron Light Application Center, Saga University, 1 Honjo, Saga840-8502, Japan.
  8. 8Department of Chemistry and IRCCS, Nagoya University, Furo-cho, Chikusa-ku, Nagoya464-8602, Japan.
  9. 9Japan Science and Technology Agency (JST), PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama332-0012, Japan.
  10. 10Graduate School of Science, Hokkaido University, Kita-10 Nishi-8, Kita-ku, Sapporo060-0810, Japan.
  11. 11National Institute of Technology (KOSEN), Toyota College, 2-1 Eiseicho, Toyota, Aichi471-8525, Japan.
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Abstract

Lattice geometry plays a fundamental role in the behavior of Bloch electrons in a crystal. The diatomic Kagome lattice, an extension of the honeycomb and Kagome lattices, is predicted to give rise to emergent and topological phenomena, but its experimental investigation has been limited thus far. Here, we fabricate a diatomic Kagome lattice through self-assembly of a triptycene derivative with phenazine moieties (Trip-Phz)─a C3-symmetric, nonplanar π-conjugated molecule. Our scanning tunneling microscopy (STM) observations show that Trip-Phz forms a highly ordered diatomic Kagome lattice terminated by zigzag-type edges on the Pb(111) surface. Combined STM measurements and tight-binding calculations provide direct evidence for the existence of the edge states that correspond to those of graphene. These states are topological edge states dictated by the quantization of the Zak phase and the bulk-edge correspondence. This work reveals an ideal platform for exploring quantum materials with unique lattice geometries using supramolecular technology.

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Cite

BibTeXRIS
BibTeX
@article{nemoto2026direct,
  title = {{Direct Observation of the Zigzag Edge States of a Supramolecular Diatomic Kagome Lattice.}},
  author = {Ryohei Nemoto and Xiangzhi Meng and Behzad Mortezapour and Alexander Weismann and Saya Nakano and Masahisa Tsuchiizu and Ryuichi Arafune and Noriaki Takagi and Sho Nakamura and Katsunori Wakabayashi and Rie Suizu and Richard Berndt and Takashi Uchihashi and Kunio Awaga},
  journal = {Nano letters},
  year = {2026},
  month = sep,
  doi = {10.1021/acs.nanolett.6c03195},
  url = {https://europepmc.org/article/MED/42915366},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Direct Observation of the Zigzag Edge States of a Supramolecular Diatomic Kagome Lattice.
AU  - Ryohei Nemoto
AU  - Xiangzhi Meng
AU  - Behzad Mortezapour
AU  - Alexander Weismann
AU  - Saya Nakano
AU  - Masahisa Tsuchiizu
AU  - Ryuichi Arafune
AU  - Noriaki Takagi
AU  - Sho Nakamura
AU  - Katsunori Wakabayashi
AU  - Rie Suizu
AU  - Richard Berndt
AU  - Takashi Uchihashi
AU  - Kunio Awaga
PY  - 2026
DA  - 2026/09/01
JO  - Nano letters
DO  - 10.1021/acs.nanolett.6c03195
UR  - https://europepmc.org/article/MED/42915366
AB  - Lattice geometry plays a fundamental role in the behavior of Bloch electrons in a crystal. The diatomic Kagome lattice, an extension of the honeycomb and Kagome lattices, is predicted to give rise to emergent and topological phenomena, but its experimental investigation has been limited thus far. Here, we fabricate a diatomic Kagome lattice through self-assembly of a triptycene derivative with phenazine moieties (Trip-Phz)─a C3-symmetric, nonplanar π-conjugated molecule. Our scanning tunneling microscopy (STM) observations show that Trip-Phz forms a highly ordered diatomic Kagome lattice terminated by zigzag-type edges on the Pb(111) surface. Combined STM measurements and tight-binding calculations provide direct evidence for the existence of the edge states that correspond to those of graphene. These states are topological edge states dictated by the quantization of the Zak phase and the bulk-edge correspondence. This work reveals an ideal platform for exploring quantum materials with unique lattice geometries using supramolecular technology.
SN  - 1530-6984
SN  - 1530-6992
ER  -