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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The ground state of two-dimensional silicon
TL;DR: In this article, the ground state of two-dimensional silicon is an unreported structure formed by a honeycomb lattice with dumbbell atoms arranged in a zigzag pattern, which is called Zigzag dumbbell silicene.
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Limitations of ab initio methods to predict the electronic-transport properties of two-dimensional semiconductors: the computational example of 2H-phase transition metal dichalcogenides
TL;DR: In this paper, the low and high-field transport properties using different variants of DFT have been calculated, and a range for the electron mobility values has been calculated for different materials.
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Quantitative determination of atomic buckling of silicene by atomic force microscopy.
TL;DR: Low-temperature atomic force microscopy with CO-terminated tips assisted by density functional theory helps characterize the structure and local symmetry of each prototypical silicene phase on Ag(111) as well as extended defects and paves the way for future atomic-scale analysis of the interplay between structural and electronic properties in other emerging 2D Xenes.
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Tunable spin polarization and electronic structure of bottom-up synthesized MoSi 2 N 4 materials
Rajibul Islam,Barun Ghosh,Barun Ghosh,Carmine Autieri,Sugata Chowdhury,Arun Bansil,Amit Agarwal,Bahadur Singh +7 more
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Optical properties of monolayer tinene in electric fields
TL;DR: The absorption spectra of monolayer tinene in perpendicular electric fields are studied by the tight-binding model and the special relationship among the multi-orbital chemical bondings, spin-orbitals couplings and Coulomb potentials accounts for the feature-rich optical properties.
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.
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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