Results 11 to 20 of about 17,081 (219)

Exploring oxide quasicrystals in internal space. [PDF]

Acta Crystallogr A Found Adv
The internal space expansion with variable system size is investigated for three different oxide quasicrystal systems. Patches of 7800, 4800 and 3600 vertices are examined in Ba–Ti–O/Pt(111), Eu–Ti–O/Pd(111) and Sr–Ti–O/Pd(111), respectively. This internal space inspection provides unique structural information for quasicrystalline systems, which goes ...
Schenk S, Haller M, Förster S, Widdra W.   +3 more
europepmc   +2 more sources

Primitive icosahedral quasicrystals in ZnMgLi(Dy, Ho, Er, Tm) systems. [PDF]

Acta Crystallogr A Found Adv
The study introduces new primitive icosahedral quasicrystals in Zn–Mg–Li–(Dy, Ho, Er, Tm) systems. Quasicrystals are studied with an X‐ray diffraction technique resolving the local atomic structure.New quasicrystals with rare‐earth elements and Li are synthesized with the self‐flux method. The starting composition involves 62.8 at.% Zn, 28.6 at.% Mg, 3.
Buganski I, Vrtnik S, Strzalka R, Jelen A, Drev S, Wolny J, Fujita N.   +6 more
europepmc   +2 more sources

Superior Performance and Catalytic Mechanism of an Icosahedral Quasicrystal Al-Cu-Fe in CO₂ Reduction to CO. [PDF]

ChemSusChem
Icosahedral quasicrystal Al63Cu25Fe12 (iQC) is employed as a high‐performance catalyst for CO2‐to‐CO conversion. The iQC exhibits superior CO2 conversion compared with its crystalline counterparts. Density functional theory calculations reveal that abundant icosahedral clusters within iQC effectively lower the reaction barrier, elucidating the origin ...
Jin H, Zhang W, Yoshikawa H, Ishikawa A, Labib F, Zhang B, Zhou J, Kang R, Qin J, Zhang J, Xu Y, Tamura R.   +11 more
europepmc   +2 more sources

Topological decomposition and transformation of photonic quasicrystals. [PDF]

Nanophotonics
Abstract Photonic quasicrystals, generated through the interference of multiple vortex beams, exhibit rich and complex topological landscapes. However, unlike their periodic counterparts, they have far lacked the same level of controllability and reconfigurability.
Wang H, Teng H, Zhong J, Lei X, Zhan Q.
europepmc   +2 more sources

BN Diamane-like Quasicrystal Based on 30° Twisted H-BN Bilayers and Its Approximants: Features of the Atomic Structure and Electronic Properties

Crystals, 2023
The dodecagonal graphene quasicrystal (GQC) based on a 30° twisted bigraphene has been well investigated. Recently, the sp3-hybridizated carbon analog, the diamane quasicrystal as a H(F) functionalized GQC was proposed.
Leonid A. Chernozatonskii, Aleksey I. Kochaev   +1 more
doaj   +1 more source

Fascinating quasicrystals [PDF]

Acta Crystallographica Section A Foundations of Crystallography, 2007
It took Dan Shechtman more than two years to get his discovery of an Al–Mn phase with icosahedral diffraction symmetryandsharp Bragg reflections published. A paradigm shift had to take place before this novel ordering state of matter – seemingly contradicting crystallographic laws – could be accepted.
Walter, Steurer, Sofia, Deloudi
openaire   +2 more sources

Tetracoordinated quasicrystals [PDF]

Physical Review B, 1991
Current model networks for amorphous Ge contain five-membered rings and pentagonal dodecahedra to explain why in the radial distribution function the third peak of the diamond structure is missing. By presenting an algorithm based on a decoration of the three-dimensional Penrose quasilattice, we prove that this local pentagonal symmetry can be extended
Peters, Jochen, Trebin, Hans-Rainer
openaire   +4 more sources

A decagonal quasicrystal with rhombic and hexagonal tiles decorated with icosahedral structural units

IUCrJ, 2020
The structure of a decagonal quasicrystal in the Zn58Mg40Y2 (at.%) alloy was studied using electron diffraction and atomic resolution Z-contrast imaging techniques. This stable Frank–Kasper Zn–Mg–Y decagonal quasicrystal has an atomic structure which can
W. Z. Wang, X. Z. Zhou, Z. Q. Yang, Y. Qi, H. Q. Ye   +4 more
doaj   +1 more source

INTERACTIONS IN QUASICRYSTALS [PDF]

International Journal of Modern Physics B, 2000
Although the effects of interactions in solid state systems still remains a widely open subject, some limiting cases such as the three dimensional Fermi liquid or the one-dimensional Luttinger liquid are by now well understood when one is dealing with interacting electrons in periodic crystalline structures.
Vidal, Julien, Mouhanna, Dominique, Giamarchi, Thierry   +2 more
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Disclinations in quasicrystals [PDF]

Physical Review Letters, 1987
The most significant feature in the transition from the quasicrystalline to the amorphous state is the loss of long-range bond-orientational order. Disclinations are candidates for elementary excitations which destroy angular correlations. Generalizing the topological defect classification, we investigate point singularities in two-dimensional ...
Bohsung, Jörg, Trebin, Hans-Rainer
openaire   +4 more sources