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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Tuning the electronic properties of germanene by molecular adsorption and under an external electric field
TL;DR: In this paper, the effects of both molecular adsorption and external electric field on the electronic properties of germanene were investigated through first-principles calculations, and the mechanism of charge transfer between small molecules and SMs was revealed by an equivalent capacitor model to explain the tunable charge transfer.
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Tuning the electronic, mechanical, thermal, and optical properties of tetrahexcarbon via hydrogenation
TL;DR: In this paper, the authors examined the possibility of manipulating the physical and chemical properties of Tetrahexcarbon sheet by controlled hydrogenation and found that a significant increase in specific heat capacity was observed in hydrogenated derivatives of TH-carbon, which would make them useful in nanoscale engineering of thermal transport.
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A cost-effective approach to synthesize NiFe2O4/MXene heterostructures for enhanced photodegradation performance and anti-bacterial activity
Tabinda Rasheed,Aamir Rasheed,Sana Munir,Sara Ajmal,Zafar Muhammad Shahzad,Ibrahim A. Alsafari,Sameh A. Ragab,Philips O. Agboola,Imran Shakir +8 more
TL;DR: In this paper, a cost-effective ultrasonication approach was employed to synthesize NiFe2O4/MXene heterostructures, which demonstrated outstanding photodegradation performance and anti-bacterial activity as compared to individual NiFe or MXene.
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Two-dimensional covalent crystals by chemical conversion of thin van der Waals materials
Vishnu Sreepal,Mehmet Yagmurcukardes,K. S. Vasu,Daniel J. Kelly,Sarah F. R. Taylor,Vasyl G. Kravets,Zakhar R. Kudrynskyi,Zakhar D. Kovalyuk,Amalia Patanè,Alexander N. Grigorenko,Sarah J. Haigh,Christopher Hardacre,Laurence Eaves,Hasan Sahin,Andre K. Geim,François M. Peeters,Rahul R. Nair +16 more
TL;DR: The concept of chemical conversion of cleavable thin van der Waals crystals into covalently bonded noncleavable ones opens exciting prospects for synthesizing a wide variety of novel atomically thin covalent crystals.
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Topological node line semimetal state in two-dimensional tetragonal allotrope of Ge and Sn
TL;DR: In this article, a new 2D tetragonal allotrope of Ge and Sn, 2D T-Ge and T-Sn, which consists of repeated square and octagon rings, is proposed.
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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