Germanene: a novel two-dimensional germanium allotrope akin to graphene and silicene
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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
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Graphene growth by molecular beam epitaxy: an interplay between desorption, diffusion and intercalation of elemental C species on islands
Francesco Presel,Holly Alexandra Tetlow,Luca Bignardi,Paolo Lacovig,Cristian A. Tache,Silvano Lizzit,Lev Kantorovich,Alessandro Baraldi,Alessandro Baraldi,Alessandro Baraldi +9 more
TL;DR: A combined experimental and theoretical study comparing the growth rate of the molecular beam epitaxy and chemical vapour deposition processes on the prototypical Ir (111) surface, employing high-resolution fast X-ray photoelectron spectroscopy to follow the growth of both single- and multi-layer graphene in real time and to identify the spectroscopic fingerprints of the different C layers.
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Multichannel Depletion-Type Field-Effect Transistor Based on Ferromagnetic Germanene
TL;DR: In this paper, a multichannel depletion-type field effect transistor (FET) operated by a vertical electric field was proposed, and the electron transport properties of the topological transistor were investigated through the nonequilibrium Green's function method.
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Two-dimensional crystal CuS—electronic and structural properties
Antonio Lenito Soares,Antonio Lenito Soares,Egon Campos dos Santos,Ángel Morales-García,Thomas Heine,Thomas Heine,Heitor A. De Abreu,Hélio A. Duarte +7 more
TL;DR: Du et al. as mentioned in this paper showed that 3L-CuS is intrinsically stable, as confirmed by phonon analysis and Born-Oppenheimer molecular dynamics simulations, with 3L−CuS about 0.15 eV per CuS less stable than the bulk.
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Formation energy and some mechanical properties of hydrogenated hexagonal monolayer of GeC
TL;DR: In this article, the properties of pristine and fully hydrogenated 2D hexagonal GeC monolayer were investigated by density functional theory calculations and in-plane stiffness and Poisson's ratio were calculated by fitting the resulted strained energy to the strain-energy formula.
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Spin-splitting effects on the interband optical conductivity and activity of phosphorene.
TL;DR: A Zeeman spin-splitting field aiming at absorbing various frequencies of the incident light and almost linearly and elliptically polarizations are reported for the transmitted and reflected waves, respectively, indicating that the phosphorene is almost transparent.
References
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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.
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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.
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