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
Topological Insulating Phases in Two-Dimensional Bismuth-Containing Single Layers Preserved by Hydrogenation
R. R. Q. Freitas,R. R. Q. Freitas,Roberto Rivelino,F. de Brito Mota,C. M. C. de Castilho,Anelia Kakanakova-Georgieva,Gueorgui Kostov Gueorguiev +6 more
TL;DR: In this article, the authors demonstrate that hydrogenation of XBi single layers leads to distinct and stable crystal structures, which can preserve their topological insulating properties, and they also show that the hydrogenation opens a band gap in this new class of 2D Z2 TIs, exhibiting an interesting electronic behavior for viable room-temperature applications of these 2D materials.
Journal ArticleDOI
2D materials: Silicene transistors
TL;DR: Artificially synthesized silicene, an atomically thin layer of silicon, is set to rival natural layered materials in the development of field effect transistors as mentioned in this paper, and it is used in a number of applications.
Journal ArticleDOI
Direct Evidence of Dirac Signature in Bilayer Germanene Islands on Cu(111).
TL;DR: 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.
Journal ArticleDOI
First-principles study of two-dimensional van der Waals heterojunctions
Wei Hu,Wei Hu,Jinlong Yang +2 more
TL;DR: In this paper, the structural, electronic, electrical, and optical properties of 2D van der Waals heterojunctions using density functional theory calculations are reviewed, including the Graphene/Silicene, germanene, phosphorene, phosphorne, hexagonal boron nitride (h-BN), graphitic carbon nitride, graphitic zinc oxide (g-ZnO) and molybdenum disulfide (MoS2).
Journal ArticleDOI
Few-atomic-layered hexagonal boron nitride: CVD growth, characterization, and applications
Majharul Haque Khan,Hua-Kun Liu,Xudong Sun,Yusuke Yamauchi,Yoshio Bando,Dmitri Golberg,Dmitri Golberg,Zhenguo Huang +7 more
TL;DR: In this paper, a review of the chemical vapour deposition (CVD) growth of Hexagonal boron nitride nanosheet (BNNS) is presented.
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