Results 21 to 30 of about 4,957 (195)

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
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Heptagonal quasicrystals: Construction of 2D lattices and demonstrations using laser pointers – Concluding part

Macedonian Journal of Chemistry and Chemical Engineering, 2023
Photographic slides of an aperiodic heptagonal tiling were used as two-dimensional diffraction gratings (as a standard approach) to describe and demonstrate the basic properties of dodecagonal quasicrystals.
Vladimir M. Petruševski, Sašo Kalajdžievski   +1 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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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.
Steurer W, Deloudi S
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On the Constitutive Modelling of Piezoelectric Quasicrystals

Crystals, 2023
Quasicrystals endowed with piezoelectric properties belong nowadays to novel piezoelectric materials. In this work, the basic framework of generalized piezoelectricity theory of quasicrystals is investigated by providing an improvement of the existing ...
Eleni Agiasofitou, Markus Lazar
doaj   +1 more source

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

Topological critical states and anomalous electronic transmittance in one-dimensional quasicrystals

Physical Review Research, 2021
Due to the absence of periodic length scale, electronic states and their topological properties in quasicrystals have been barely understood. Here, we focus on one-dimensional quasicrystals and reveal that their electronic critical states are ...
Junmo Jeon, SungBin Lee
doaj   +1 more source

2D honeycomb transformation into dodecagonal quasicrystals driven by electrostatic forces

Nature Communications, 2022
Quasicrystals are perfectly ordered crystals lacking translational symmetry. Here the authors unravel the formation mechanism of two-dimensional dodecagonal quasicrystals that arise from systematic modifications of a hexagonal honeycomb structure.
Sebastian Schenk, Oliver Krahn, Eric Cockayne, Holger L. Meyerheim, Marc de Boissieu, Stefan Förster, Wolf Widdra   +6 more
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Formation of a single quasicrystal upon collision of multiple grains

Nature Communications, 2021
Quasicrystals exhibit long-range order without periodicity. The authors report an approach for quasicrystal fabrication and show through in situ imaging and corresponding simulations the formation of a single decagonal quasicrystal arising from ...
Insung Han, Kelly L. Wang, Andrew T. Cadotte, Zhucong Xi, Hadi Parsamehr, Xianghui Xiao, Sharon C. Glotzer, Ashwin J. Shahani   +7 more
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Unravelling friction anisotropy by atomic force microscopy. [PDF]

J Microsc
Abstract Friction plays a crucial role in both natural phenomena, from the flow of blood cells to earthquakes, and technological applications, from car engines to wind turbines. One of the most fundamental aspects of tribology is friction anisotropy, that is, the dependence of the friction force vector on the direction of sliding.
Cafolla C, Campione M.
europepmc   +2 more sources