Structure of the fivefold surface of the Ag-In-Yb icosahedral quasicrystal

Sharma, H. R.; Shimoda, Masahiko; Sagisaka, Kaoru; Takakura, Hiroyuki; Smerdon, J. A.; Nugent, P. J.; McGrath, R.; Fujita, Daisuke; Ohhashi, Satoshi; Tsai, A.‐P.

doi:10.1103/physrevb.80.121401

Cited by 40 publications

(50 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Before the deposition, the substrate was prepared and characterized as described in ref. 24. The pressure during deposition remained almost the same as the base pressure.…”

Section: Methodsmentioning

confidence: 55%

“…The In decagon at each vertex of the P1 tiling is surrounded by ten Yb pentagons, which belong to different RTH units or to the glue atoms between the RTH clusters. In STM, large protrusions are observed at the positions of In decagons at negative bias, whereas the Yb pentagons are resolved at positive bias 24 .…”

Section: Resultsmentioning

confidence: 98%

“…1a). The terraces are formed preferentially at bulk planes, which are dense, Yb rich and intersect the cluster centres 24 . STM images taken at negative sample bias voltage are characterized by protrusions located at the vertices of a Penrose P1 tiling with an edge length of about 24±1 Å (ref.…”

Section: Resultsmentioning

confidence: 99%

“…STM images taken at negative sample bias voltage are characterized by protrusions located at the vertices of a Penrose P1 tiling with an edge length of about 24±1 Å (ref. 24). The P1 tiling consists of four different tiles: pentagons, stars, rhombi and boats 25 .…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Templated three-dimensional growth of quasicrystalline lead

et al. 2013

Self Cite

View full text Add to dashboard Cite

Quasicrystals, materials with aperiodic long-range order, have been found in intermetallics, soft materials such as colloids and supermolecules, and also in two-dimensional monolayer films. Here we present the first example of three-dimensional growth of a single-element quasicrystalline film. Using a hitherto unexplored template, the icosahedral Ag-In-Yb quasicrystal, and various experimental techniques combined with theoretical calculations of adsorption energies, we find that lead atoms deposited on the surface occupy the positions of atoms in the rhombic triacontahedral cluster, the building block of the substrate, and thus grow in layers with different heights and adsorption energies. We show that the adlayeradlayer interaction is crucial for stabilizing this epitaxial quasicrystalline structure. The finding opens an avenue for further investigation of the impact of the aperiodic atomic order over periodic order on the physical and chemical properties of materials.

show abstract

“…Before the deposition, the substrate was prepared and characterized as described in ref. 24. The pressure during deposition remained almost the same as the base pressure.…”

Section: Methodsmentioning

confidence: 55%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Templated three-dimensional growth of quasicrystalline lead

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Our hope, a priori, was that the chemical potential of Zn in the Al-Pd-Zn approximant would be significantly lower than in elemental Zn. As precedent, the surface of quasicrystalline Ag-In-Yb has been annealed and characterized successfully in UHV, despite the rather high vapor pressure of elemental Yb [12,13].…”

Section: Introductionmentioning

confidence: 99%

Weak bonding of Zn in an Al-based approximant based on surface measurements

Yuen

Ünal

Jing

et al. 2010

Philosophical Magazine

View full text Add to dashboard Cite

We have studied two surfaces of a new Al-Pd-Zn approximant using mass spectrometry, X-ray photoemission spectroscopy (XPS) and scanning tunneling microscopy (STM). Zn is bonded weakly in this approximant, perhaps as weakly as in elemental Zn. This is based upon three observations: (1) the low vapor pressure of Zn above the approximant (detectable in the gas phase at 600 K), (2) preferential sputtering of Zn (contrary to the usual preferential sputtering of Al in Al-rich quasicrystals), and (3) preferential surface segregation of Zn. We further show that preferential segregation -and perhaps incipient evaporation -causes the surface to roughen, preventing it from forming a terrace-step morphology. Finally, our data show that at low O2 pressures, Al oxidizes. In air, Zn oxidizes as well. All results and conclusions are similar for the two-fold and pseudo-10-fold surfaces. RightsThis article is (co-)authored by an employee of the United States Government and is not subject to copyright in the United States (17 U.S.C. §105). Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden.The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. We have studied two surfaces of a new Al-Pd-Zn approximant using mass spectrometry, X-ray photoemission spectroscopy (XPS) and scanning tunneling microscopy (STM). Zn is bonded weakly in this approximant, perhaps as weakly as in elemental Zn. This is based upon three observations: (1) the low vapor pressure of Zn above the approximant (detectable in the gas phase at 600 K), (2) preferential sputtering of Zn (contrary to the usual preferential sputtering of Al in Al-rich quasicrystals), and (3) preferential surface segregation of Zn. We further show that preferential segregation -and perhaps incipient evaporation -causes the surface to roughen, preventing it from forming a terrace-step morphology. Finally, our data show that at low O 2 pressures, Al oxidizes. In air, Zn oxidizes as well. All results and conclusions are similar for the two-fold and pseudo-10-fold surfaces. Philosophical MagazineVol. 91, Nos. 19-21, 1-21 July 2011, 2879-

show abstract

Surfaces of Quasicrystals and Complex Metallic Alloys

Thiel

McGrath

2013

Surface and Interface Science

View full text Add to dashboard Cite

Structure of the fivefold surface of the Ag-In-Yb icosahedral quasicrystal

Cited by 40 publications

References 23 publications

Templated three-dimensional growth of quasicrystalline lead

Templated three-dimensional growth of quasicrystalline lead

Weak bonding of Zn in an Al-based approximant based on surface measurements

Surfaces of Quasicrystals and Complex Metallic Alloys

Contact Info

Product

Resources

About