Observation of One-Dimensional Dirac Fermions in Silicon Nanoribbons

Shaosheng Yue, Hui Zhou, Ya Feng, Yue Wang, Zhenyu Sun, Daiyu Geng, Masashi Arita, Shiv Kumar, Kenya Shimada, Peng Cheng, Lan Chen, Yugui Yao, Sheng Meng*, Kehui Wu*, Baojie Feng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Dirac materials, which feature Dirac cones in the reciprocal space, have been one of the hottest topics in condensed matter physics in the past decade. To date, 2D and 3D Dirac Fermions have been extensively studied, while their 1D counterparts are rare. Recently, Si nanoribbons (SiNRs), which are composed of alternating pentagonal Si rings, have attracted intensive attention. However, the electronic structure and topological properties of SiNRs are still elusive. Here, by angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy measurements, first-principles calculations, and tight-binding model analysis, we demonstrate the existence of 1D Dirac Fermions in SiNRs. Our theoretical analysis shows that the Dirac cones derive from the armchairlike Si chain in the center of the nanoribbon and can be described by the Su–Schrieffer–Heeger model. These results establish SiNRs as a platform for studying the novel physical properties in 1D Dirac materials.

Original languageEnglish
Pages (from-to)695-701
Number of pages7
JournalNano Letters
Volume22
Issue number2
DOIs
Publication statusPublished - 26 Jan 2022

Keywords

  • 1D Dirac Fermions
  • ARPES
  • DFT calculations
  • SSH model
  • Si nanoribbon

Fingerprint

Dive into the research topics of 'Observation of One-Dimensional Dirac Fermions in Silicon Nanoribbons'. Together they form a unique fingerprint.

Cite this