Evidence for a different dispersion of the topological edge state of germanene at armchair and zigzag edges

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
4 Downloads (Pure)

Abstract

Utilizing a tunneling spectroscopy approach based on the energy-dependent inverse decay length, our research unveils distinct dispersion characteristics of germanene's topological edge states. We observe a pronounced variance in Fermi velocity, with armchair edges exhibiting a velocity higher than zigzag edges by about an order of magnitude. This difference highlights the influence of edge termination on the energy-momentum dispersion relation of one-dimensional topological edge states in two-dimensional topological insulators, aligning with the theoretical framework of a Kane-Mele topological insulator.

Original languageEnglish
Article number115419
JournalPhysical Review B
Volume109
Issue number11
DOIs
Publication statusPublished - 15 Mar 2024

Fingerprint

Dive into the research topics of 'Evidence for a different dispersion of the topological edge state of germanene at armchair and zigzag edges'. Together they form a unique fingerprint.

Cite this