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Direct Evidence of Dirac Signature in Bilayer Germanene Islands on Cu(111)
Author(s) -
Qin Zhihui,
Pan Jinbo,
Lu Shuangzan,
Shao Yan,
Wang Yeliang,
Du Shixuan,
Gao HongJun,
Cao Gengyu
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201606046
Subject(s) - germanene , materials science , bilayer , dirac (video compression format) , nanotechnology , signature (topology) , condensed matter physics , chemical physics , silicene , physics , quantum mechanics , geometry , graphene , membrane , neutrino , mathematics , biology , genetics
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.