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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Daniele Chiappe,Inge Asselberghs,Surajit Sutar,Serena Iacovo,Valeri Afanas'ev,Andre Stesmans,Yashwanth Balaji,Lisanne Peters,Markus Heyne,Manuel Mannarino,Wilfried Vandervorst,Safak Sayan,Safak Sayan,Cedric Huyghebaert,Matty Caymax,Marc Heyns,Stefan De Gendt,Iuliana Radu,Aaron Thean +18 more
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Dirac Signature in Germanene on Semiconducting Substrate.
Jincheng Zhuang,Jincheng Zhuang,Chen Liu,Zhiyong Zhou,Gilberto Casillas,Haifeng Feng,Haifeng Feng,Xun Xu,Jiaou Wang,Weichang Hao,Xiaolin Wang,Xiaolin Wang,Shi Xue Dou,Shi Xue Dou,Zhenpeng Hu,Yi Du,Yi Du +16 more
TL;DR: These results demonstrate that the germanium nanosheets with √3 ×√3 germanene can be an ideal platform for fundamental research and for the realization of high‐speed and low‐energy‐consumption field‐effect transistors.
Journal ArticleDOI
Edge functionalized germanene nanoribbons: impact on electronic and magnetic properties
TL;DR: A spin-polarized density functional theory (DFT) study of electronic and magnetic properties of pristine, chemically functionalized and doped armchair germanene nanoribbons (AGeNRs) was performed in this article.
Journal ArticleDOI
Hydrogen Terminated Germanene for a Robust Self-Powered Flexible Photoelectrochemical Photodetector.
Nana Liu,Hui Qiao,Kang Xu,Yilian Xi,Long Ren,Long Ren,Ningyan Cheng,Dandan Cui,Xiang Qi,Xun Xu,Xun Xu,Weichang Hao,Shi Xue Dou,Shi Xue Dou,Yi Du,Yi Du +15 more
TL;DR: It is revealed that the hydrogen terminated germanenes not only maintains a high carrier mobility similar to that of germanene, but also exhibits strong light-matter interaction with a direct band gap, exhibiting great potential for photoelectronics.
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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