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Related papers: Quasiperiodic gallium adlayer on i-Al-Pd-Mn

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Scanning tunnelling microscopy has been used to study the formation of a Bi monolayer deposited on the five-fold surface of i-Al70Pd21Mn9. Upon deposition of low sub-monolayer coverages, the nucleation of pentagonal clusters of Bi adatoms…

Other Condensed Matter · Physics 2009-11-13 J. A. Smerdon , J. K. Parle , L. H. Wearing , T. A. Lograsso , A. R. Ross , R. McGrath

Realization of an elemental solid-state quasicrystal has remained a distant dream so far in spite of extensive work in this direction for almost two decades. Here, we report the discovery of quasiperiodic ordering in a thick layer of…

Using electron diffraction, we show that free electron metals such as sodium and potassium form a highly regular quasiperiodic monolayer on the fivefold surface of icosahedral Al-Pd-Mn and that the quasiperiodicity propagates up to the…

Materials Science · Physics 2009-09-30 A. K. Shukla , R. S. Dhaka , S. W. Dsouza , Sanjay Singh , D. Wu , T. A. Lograsso , M. Krajci , J. Hafner , K. Horn , S. R. Barman

In this work, we present the formation and characterization of a quaternary (pseudo ternary) icosahedral quasicrystal in Al65Ga5Pd17Mn13 alloy. The X ray diffraction and transmission electron microscopy confirmed the formation of…

Materials Science · Physics 2009-11-13 T. P. Yadav , M. A. Shaz , R. S. Tiwari , O. N. Srivastava

We have synthesised a thin film of copper with a quasi-periodic structure by the adsorption of copper atoms on the five-fold surface of the icosahedral quasicrystal Al-Pd-Mn at room temperature. The quasi-periodicity of the thin film is…

Materials Science · Physics 2009-11-10 J. Ledieu , J. T. Hoeft , D. E. Reid , J. A. Smerdon , R. D. Diehl , T. A. Lograsso , A. R. Ross , R. McGrath

We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the 5-fold symmetric surface of an icosahedral Al-Pd-Mn monograin. The decagonal structure of the epilayer is evidenced by x-ray…

Disordered Systems and Neural Networks · Physics 2009-11-07 D. Naumovic , P. Aebi , L. Schlapbach , C. Beeli , K. Kunze , T. A. Lograsso , D. W. Delaney

In a recent Letter, Zhao et al. [1] reported the origin of quasi-one-dimensional metal-insulator (MI) transitions in compound semiconductor surfaces. Based on a density-functional theory (DFT) calculation within the generalized gradient…

Mesoscale and Nanoscale Physics · Physics 2017-08-02 Sun-Woo Kim , Yoon-Gu Kang , Hyun-Jung Kim , Jun-Hyung Cho

Lead has been deposited on the ten-fold surface of decagonal Al72Ni11Co17 to form an epitaxial quasicrystalline single-element monolayer. The overlayer grows through nucleation of nanometer-sized irregular islands and the coverage saturates…

Other Condensed Matter · Physics 2008-06-02 J. A. Smerdon , L. Leung , J. K. Parle , C. J. Jenks , R. McGrath , V. Fournee , J. Ledieu

The dodecagonal quasicrystal classified into the five-dimensional space group P126/mmc, recently discovered in a Mn-Cr-Ni-Si alloy, has been analyzed using atomic-resolution spherical aberration-corrected electron microscopy, i.e.…

Materials Science · Physics 2016-02-17 Tsutomu Ishimasa , Shuhei Iwami , Norihito Sakaguchi , Ryo Oota , Marek Mihalkovic

While the phenomenon of metal substrate adatom incorporation into molecular overlayers is generally believed to occur in several systems, the experimental evidence for this relies on the interpretation of scanning tunnelling microscopy…

We investigate the adsorption sites of $3d$ transition metal (TM) adatoms by means of low-temperature scanning tunneling microscopy and spectroscopy. Co and Ni adatoms were adsorbed on two types of graphene on SiC(0001), i.e. pristine…

Mesoscale and Nanoscale Physics · Physics 2013-11-21 T. Eelbo , M. Waśniowska , M. Gyamfi , S. Forti , U. Starke , R. Wiesendanger

In order to study the novel gas detection or sensing applications of gallium nitride monolayer (GaN-ML), we mainly focused on the structural, energetic, electronic and magnetic properties of toxic gas molecules (CO, NO) adsorbed on…

Materials Science · Physics 2023-06-06 Han-Fei Li , Si-Qi Li , Guo-Xiang Chen

We discover the detailed atomic structure of $d$-MgZnY, a stable decagonal quasicrystal alloy of the layered Frank-Kasper type, and related phases, using the "tiling and decoration" approach. The atoms have invariable sites in the rectangle…

Materials Science · Physics 2011-12-19 M. Mihalkovic , C. L. Henley , J. Richmond-Decker , M. Oxborrow

We present an in-depth analysis of the atomic and electronic structure of the quasi one-dimensional (1D) surface reconstruction of Ga on Si(112) based on Scanning Tunneling Microscopy and Spectroscopy (STM and STS), Rutherford…

Other Condensed Matter · Physics 2007-05-23 P. C. Snijders , C. Gonzalez , S. Rogge , R. Perez , J. Ortega , F. Flores , H. H. Weitering

The paper reports on fundamental properties of the GaN/AlN quantum wells (QWs) with nominal subcritical thicknesses of 0.75-2 monolayers (MLs). They are grown by plasma-activated molecular beam epitaxy, varying either the nominal thickness…

A quasiperiodic Pb monolayer has been formed on the five-fold surface of the Al-Pd-Mn quasicrystal. Growth of the monolayer proceeds via self-assembly of an interconnected network of pentagonal Pb stars, which are shown to be tau-inflated…

Materials Science · Physics 2009-11-13 J. Ledieu , L. Leung , L. H. Wearing , R. McGrath , T. A. Lograsso , D. Wu , V. Fournée

Interfaces formed between monolayer transition metal dichalcogenides (TMDs) and (metallo)phthalocyanine molecules are promising in energy applications and provide a platform for studying mixed-dimensional molecule-semiconductor…

Materials Science · Physics 2021-12-13 Olugbenga Adeniran , Zhen-Fei Liu

We utilize a single atom substitution technique with spectroscopic imaging in a scanning tunneling microscope (STM) to visualize the anisotropic spatial structure of magnetic and non-magnetic transition metal acceptor states in the GaAs…

Materials Science · Physics 2009-09-30 Anthony Richardella , Dale Kitchen , Ali Yazdani

Icosahedral quasicrystals spontaneously form from the melt in simulations of Al--Cu--Fe alloys. We model the interatomic interactions using oscillating pair potentials tuned to the specific alloy system based on a database of density…

Materials Science · Physics 2020-03-04 Marek Mihalkovic , Michael Widom

Decagonal quasiperiodic ordering of Sn thin film on $d$-Al-Ni-Co, is shown based on scanning tunneling microscopy (STM), low-energy electron diffraction and density functional theory (DFT). Interestingly, the decagonal structural…

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