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 Computational 2D Materials Database: high-throughput modeling and discovery of atomically thin crystals
Sten Haastrup,Mikkel Strange,Mohnish Pandey,Thorsten Deilmann,Per Simmendefeldt Schmidt,N. F. Hinsche,Morten Niklas Gjerding,Daniele Torelli,Peter Mahler Larsen,Anders C. Riis-Jensen,Jakob Gath,Karsten Wedel Jacobsen,Jens Jørgen Mortensen,Thomas Olsen,Kristian Sommer Thygesen +14 more
TL;DR: The Computational 2D Materials Database (C2DB) as discussed by the authors is a large-scale database of 2D materials and van der Waals heterostructures, including tens of thousands of materials.
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Exploring Two-Dimensional Materials toward the Next-Generation Circuits: From Monomer Design to Assembly Control
TL;DR: This review will first overview the emerging 2D materials and then offer a clear guideline of varied physical and chemical strategies for tuning their properties and assembly strategies of2D materials will also be included.
Journal ArticleDOI
Germanene: the germanium analogue of graphene.
Adil Acun,Lijie Zhang,Pantelis Bampoulis,M. Farmanbar,A. van Houselt,Alexander N. Rudenko,Magalí Lingenfelder,Geert Brocks,Bene Poelsema,Mikhail I. Katsnelson,Henricus J.W. Zandvliet +10 more
TL;DR: A topical review of the various methods to synthesize germanene is addressed, a brief overview of the key results that have been obtained by density functional theory calculations are provided and the potential of germanenes for future applications is discussed.
Journal ArticleDOI
2D Materials for Gas Sensing Applications: A Review on Graphene Oxide, MoS2, WS2 and Phosphorene
M. Donarelli,Luca Ottaviano +1 more
TL;DR: A comprehensive review of 2D materials-based gas sensor is reported, mainly focused on the recent developments of graphene oxide, exfoliated MoS2 and WS2 and phosphorene, for gas detection applications.
Journal ArticleDOI
Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers
Babak Anasori,Chenyang Shi,Eun Ju Moon,Yu Xie,Cooper Voigt,Paul R. C. Kent,Steven J. May,Simon J. L. Billinge,Simon J. L. Billinge,Michel W. Barsoum,Yury Gogotsi +10 more
TL;DR: The electronic properties of these Mo-containing MXenes are compared with their Ti3C2 counterparts, and are found to be no longer metallic-like conductors; instead the resistance increases mildly with decreasing temperatures, and density functional theory calculations suggest that OH terminated Mo-Ti MXene are semiconductors with narrow band gaps.
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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