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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Perspective on Some Recent and Future Developments in Casimir Interactions
TL;DR: In this article, a critical review of recent developments in Casimir physics motivated by discoveries of novel materials is presented, including topologically nontrivial properties of the graphene family, Chern and topological insulators.
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Realization of a Buckled Antimonene Monolayer on Ag(111) via Surface Engineering
Shuo Sun,Shuo Sun,Tong Yang,Yong Zheng Luo,Jian Gou,Yuli Huang,Chengding Gu,Zhirui Ma,Xu Lian,Sisheng Duan,Andrew T. S. Wee,Min Lai,Jia Lin Zhang,Yuan Ping Feng,Wei Chen +14 more
TL;DR: The synthesis of an antimonene monolayer with a three-heights-buckling configuration overlaid on SbAg2 surface alloy-covered Ag(111) by molecular beam epitaxy, in which the underlying surface alloy provides interfacial interactions to modulate the structure of the antimonenes monolayers.
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Optical scanning tunneling microscopy based chemical imaging and spectroscopy
TL;DR: Methods to couple optical imaging and spectroscopy with scanning tunneling microscopy provide new insights into individual molecular adsorbates, surface-supported molecular assemblies, and two-dimensional materials with subnanoscale resolution, enabling the fundamental study of chemistry at the spatial and temporal limit.
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Micrometre-scale single-crystalline borophene on a square-lattice Cu(100) surface
Rongting Wu,Stephen Eltinge,Ilya Drozdov,Adrian Gozar,Percy Zahl,Jerzy T. Sadowski,Sohrab Ismail-Beigi,Ivan Bozovic +7 more
TL;DR: In this paper , the synthesis of borophene on a square-lattice Cu(100) surface was reported and it was shown that incommensurate coordination reduces the boropoulos-substrate interactions and also leads to a boropshene polymorph different from those previous reported.
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Temperature-dependent collective effects for silicene and germanene.
TL;DR: In this paper, the authors have numerically calculated electron exchange and correlation energies and dynamical polarization functions for recently discovered silicene, germanene and other buckled honeycomb lattices at various temperatures.
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.
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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
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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