Germanene: a novel two-dimensional germanium allotrope akin to graphene and silicene
Reads0
Chats0
TLDR
In this article, an atom-thin, ordered, two-dimensional multi-phase film was grown in situ through germanium molecular beam epitaxy using a gold surface as a substrate.Abstract:
We have grown an atom-thin, ordered, two-dimensional multi-phase film in situ through germanium molecular beam epitaxy using a gold (111) surface as a substrate. Its growth is similar to the formation of silicene layers on silver (111) templates. One of the phases, forming large domains, as observed in scanning tunneling microscopy, shows a clear, nearly flat, honeycomb structure. Thanks to thorough synchrotron radiation core-level spectroscopy measurements and advanced density functional theory calculations we can identify it as a ?3????3 R(30?) germanene layer in conjunction with a ?7????7 R(19.1?) Au(111) supercell, presenting compelling evidence of the synthesis of the germanium-based cousin of graphene on gold.read more
Citations
More filters
Journal ArticleDOI
Crystal structures and thermodynamic stabilities of two new CaGe2 polymorphs
TL;DR: A stoichiometric CaGe2 sample was synthesized using high-purity Ca and Ge pieces, and its crystal structure was characterized by high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and X-ray diffraction as discussed by the authors.
Journal ArticleDOI
Ge2Pt hut clusters: A substrate for germanene
Rik van Bremen,Pantelis Bampoulis,Johannes Aprojanz,M.A. Smithers,Bene Poelsema,Christoph Tegenkamp,Harold J.W. Zandvliet +6 more
TL;DR: In this paper, the formation and structure of Ge2Pt hut clusters were studied in order to understand their germanene termination layer, and it was shown that the hut-shaped clusters have their (001) plane oriented parallel to the Ge(110) surface and their (100) plane facing in the Ge[1 1 ¯0] direction.
Journal ArticleDOI
Electro-optical and mechanical properties of Zinc antimonide (ZnSb) monolayer and bilayer: A first-principles study
Asadollah Bafekry,Mehmet Yagmurcukardes,Masoud Shahrokhi,M. Ghergherehchi,D. Kim,Bohayra Mortazavi +5 more
TL;DR: In this paper, the structural, magnetic, electronic/optical and mechanical features of the sp2-hybridized honeycomb ZnSb monolayer and bilayer were investigated.
Journal ArticleDOI
Evolution of the linear band dispersion of monolayer and bilayer germanene on Cu(111).
TL;DR: The structural and electronic properties of the recently synthesized monolayer and bilayer germanene on Cu(111) though first-principles calculations are studied to facilitate research into the synthesis, extraordinary quantum properties, and applications based on the two-dimensional (2D) germanium system.
Journal ArticleDOI
Inherent mechanical properties of bilayer germanene coupled by covalent bonding
TL;DR: This study suggests that bonded bilayer germanene shows higher mechanical strength compared to monolayer germene, and the interlayer shear characteristics of the bilayer structure have been looked into.
References
More filters
Journal ArticleDOI
Two- and one-dimensional honeycomb structures of silicon and germanium.
TL;DR: In this paper, first-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensional, low-buckled, honeycomb structures.
Journal Article
Two- and one-dimensional honeycomb structures of silicon and germanium
TL;DR: First-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensional, low-buckled, honeycomb structures, which show remarkable electronic and magnetic properties, which are size and orientation dependent.
Journal ArticleDOI
Quantum spin Hall effect in silicene and two-dimensional germanium.
TL;DR: It is demonstrated that silicene with topologically nontrivial electronic structures can realize the quantum spin Hall effect (QSHE) by exploiting adiabatic continuity and the direct calculation of the Z(2) topological invariant.
Journal ArticleDOI
Experimental Evidence for Epitaxial Silicene on Diboride Thin Films
Antoine Fleurence,Rainer Friedlein,Taisuke Ozaki,Hiroyuki Kawai,Ying Wang,Yukiko Yamada-Takamura +5 more
TL;DR: It is shown that two-dimensional, epitaxial silicene forms through surface segregation on zirconium diboride thin films grown on Si wafers and that the buckling and thus the electronic properties of silicenes are modified by epitaxials strain.
Journal ArticleDOI
Low-energy effective Hamiltonian involving spin-orbit coupling in silicene and two-dimensional germanium and tin
TL;DR: In this article, the authors derived the low energy effective Hamiltonian involving spin-orbit coupling (SOC) for silicene, which is the analog to the graphene quantum spin Hall effect (QSHE) Hamiltonian.
Related Papers (5)
Generalized Gradient Approximation Made Simple
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more