Spiral Edge States in Topological 2D Sb2Te3 Crystals

Abstract

This work explores the edge state conduction properties of twinned and spiraled, 2D Sb2Te3 topological insulator crystals. We show the structure supports spatially continuous edge states within two spiral and knotted edge conduction channels. The channels are connected through a topological defect. This geometry introduces boundary conditions into the 2D crystal that modifies the edge state dispersion. Using a combination of low loss Electron Energy Loss Spectroscopy, Magnetic Force Microscopy and traditional carrier transport measurements we identify a distinct excitation at 0.155 eV in the spiral that seems to be related to two isolated states within the gap. This state is localized to the crystal edges. The modification of edge state bands using manipulation of a systems quantum geometry may open new avenues for the use of 2D topological systems.

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Cite

BibTeX RIS

BibTeX

@misc{carlson2026spiral,
  title = {{Spiral Edge States in Topological 2D Sb2Te3 Crystals}},
  author = {Timothy Carlson and Daniel Lazega and Scott McGuire and Mihirangi Medahinne and Motahhare Mirhosseini and Gabriel Marcus and ChaoChao Dun and Maria Kolesnik-Gray and Vojislav Krstic and David Carroll},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.14905},
  eprint = {2610.14905},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.14905},
  note = {CC BY-NC-SA 4.0},
}

RIS

TY  - UNPB
TI  - Spiral Edge States in Topological 2D Sb2Te3 Crystals
AU  - Timothy Carlson
AU  - Daniel Lazega
AU  - Scott McGuire
AU  - Mihirangi Medahinne
AU  - Motahhare Mirhosseini
AU  - Gabriel Marcus
AU  - ChaoChao Dun
AU  - Maria Kolesnik-Gray
AU  - Vojislav Krstic
AU  - David Carroll
PY  - 2026
DA  - 2026/10/10
PB  - arXiv
DO  - 10.48550/arxiv.2610.14905
UR  - https://arxiv.org/abs/2610.14905
AB  - This work explores the edge state conduction properties of twinned and spiraled, 2D Sb2Te3 topological insulator crystals. We show the structure supports spatially continuous edge states within two spiral and knotted edge conduction channels. The channels are connected through a topological defect. This geometry introduces boundary conditions into the 2D crystal that modifies the edge state dispersion. Using a combination of low loss Electron Energy Loss Spectroscopy, Magnetic Force Microscopy and traditional carrier transport measurements we identify a distinct excitation at 0.155 eV in the spiral that seems to be related to two isolated states within the gap. This state is localized to the crystal edges. The modification of edge state bands using manipulation of a systems quantum geometry may open new avenues for the use of 2D topological systems.
ER  -

Abstract

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