Direct Evidence of Dirac Signature in Bilayer Germanene Islands on Cu(111).
basic_science · Level V
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- Record sourced from PubMed, PMID 28134451.
- Also identified by DOI 10.1002/adma.201606046.
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Abstract
Bernal-stacked bilayer germanene with a stable buckled honeycomb structure has been successfully synthesized on Cu(111). Structural and electronic characterizations as well as theoretical calculations unequivocally demonstrate for the first time the presence of a nearly linear energy dispersion in the vicinity of the Fermi energy, as expected of the Dirac signature for theoretical freestanding germanene.