Skip to content
DraconiticResearch
Search Sources API
201,683 studies31 sourcesUpdated 3 min ago
Peer-reviewedCC BYACS nano

Protected Metallic Edge States in a Graphene-Capped Quantum Spin Hall System.

  • Huu Thoai Ngo1
  • Zamin Mamiyev1
  • Niclas Tilgner1,2
  • Andres David Peña Unigarro1,2
  • Sibylle Gemming1,2
  • Thomas Seyller1,2
  • Christoph Tegenkamp1,3
  1. 1Institut für Physik, Technische Universität Chemnitz, Reichenhainer Str. 70, ChemnitzD-09126, Germany.
  2. 2Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz09126, Germany.
  3. 3TEM-Center, Chemnitz University of Technology, Erfenschlager Straße 73, ChemnitzD-09125, Germany.
Read full textPDFDOICite

Abstract

Epitaxial bismuthene on SiC(0001) hosts symmetry-protected metallic edge states within a large bulk band gap, establishing it as a promising two-dimensional topological insulator for high-temperature quantum spin Hall (QSH) transport. Here we realize bismuthene islands by intercalating Bi beneath zero-layer graphene on SiC(0001) followed by hydrogen treatment, yielding well-defined edge terminations. Spectroscopic measurements demonstrate the metallic edge states originating from the underlying bismuthene layer. The graphene overlayer interacts only weakly with the bismuthene, preserving its topological character while providing environmental protection. Overall, our results establish graphene-capped bismuthene as a robust and tunable platform for studying correlated quantum states, with the one-dimensional edge channels exhibiting signatures of electronic correlation effects.

Related

  1. Fate of average symmetry-protected topological states under symmetry-preserving quantum operations
    Yoshihito Kuno, Takahiro Orito
    arXivPreprintCC BY 4.0Full textCondensed matterQuantum physics & quantum informationarXiv
  2. Topologically Protected Edge States in One-Dimensional Quantum Walks
    Emily Maxey, Jacob Mansfield, Beth Thacker +1
    arXivPreprintCC BY 4.0Full textQuantum physics & quantum informationarXiv
  3. Valley polarization dependence of candidate even-denominator fractional quantum Hall states in monolayer graphene
    Saswata Sahu, Amarendra Pr. Indra, Moumita Indra
    arXivPreprintCC BY 4.0Full textCondensed matterQuantum physics & quantum informationarXiv
  4. Quantum transport across normal-superlattice-normal graphene junctions: Fabry-Pérot interference, Hofstadter butterfly, and supersnake states
    Che-Pin Hsu, Alina Mreńca-Kolasińska, Aitor Garcia-Ruiz +4
    arXivPreprintCC BY 4.0Full textCondensed matterarXiv
  5. Length-Independent Quantum Transport through Engineered Band States in Graphene Nanoribbon Junctions
    Song Jiang, Fabrice Scheurer, Qiang Sun +7
    ACS NanoPeer-reviewedCC BY 4.0Full textCondensed matterHAL

Cite

BibTeXRIS
BibTeX
@article{ngo2026protected,
  title = {{Protected Metallic Edge States in a Graphene-Capped Quantum Spin Hall System.}},
  author = {Huu Thoai Ngo and Zamin Mamiyev and Niclas Tilgner and Andres David Peña Unigarro and Sibylle Gemming and Thomas Seyller and Christoph Tegenkamp},
  journal = {ACS nano},
  year = {2026},
  month = oct,
  doi = {10.1021/acsnano.6c14197},
  url = {https://europepmc.org/article/MED/42917224},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Protected Metallic Edge States in a Graphene-Capped Quantum Spin Hall System.
AU  - Huu Thoai Ngo
AU  - Zamin Mamiyev
AU  - Niclas Tilgner
AU  - Andres David Peña Unigarro
AU  - Sibylle Gemming
AU  - Thomas Seyller
AU  - Christoph Tegenkamp
PY  - 2026
DA  - 2026/10/01
JO  - ACS nano
DO  - 10.1021/acsnano.6c14197
UR  - https://europepmc.org/article/MED/42917224
AB  - Epitaxial bismuthene on SiC(0001) hosts symmetry-protected metallic edge states within a large bulk band gap, establishing it as a promising two-dimensional topological insulator for high-temperature quantum spin Hall (QSH) transport. Here we realize bismuthene islands by intercalating Bi beneath zero-layer graphene on SiC(0001) followed by hydrogen treatment, yielding well-defined edge terminations. Spectroscopic measurements demonstrate the metallic edge states originating from the underlying bismuthene layer. The graphene overlayer interacts only weakly with the bismuthene, preserving its topological character while providing environmental protection. Overall, our results establish graphene-capped bismuthene as a robust and tunable platform for studying correlated quantum states, with the one-dimensional edge channels exhibiting signatures of electronic correlation effects.
SN  - 1936-0851
SN  - 1936-086X
ER  -