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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.

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Radical-Initiated and Thermally Induced Hydrogermylation of Alkenes on the Surfaces of Germanium Nanosheets

TL;DR: In this article, a sonochemical exfoliation of hydride-terminated germanane flakes (HGe-flakes) derived from crystalline CaGe2 is described.
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A phosphorene-like InP3 monolayer: structure, stability, and catalytic properties toward the hydrogen evolution reaction

TL;DR: In this paper, a 2D phosphorene-like InP3 (P-InP3) was obtained by exfoliating the (0−1 1) surface of the bulk with a cleavage energy of 1.08-1.37 J m−2.
Journal ArticleDOI

Porous hexagonal boron oxide monolayer with robust wide band gap: A computational study

TL;DR: By means of density functional theory (DFT) computations, this paper designed porous hexagonal boron oxide (ph-BO) monolayer, which is purely planar, and has uniform pores in diameter of 6.27
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Stability and thermal evolution of transition metal and silicon clusters

TL;DR: The results of computer simulation studies of transition metal and silicon clusters published in the last decade are summarized in this paper, where most important structure-dependent kinetic and mechanical characteristics are discussed, including specific temperature ranges of disordering corresponding to isomerization and quasi-melting.
References
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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.
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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

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.
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