Results 91 to 100 of about 17,081 (219)

Landau levels in quasicrystals

, 2018
Two-dimensional tight-binding models for quasicrystals made of plaquettes with commensurate areas are considered. Their energy spectrum is computed as a function of an applied perpendicular magnetic field.
Fuchs, Jean-Noël, Mosseri, Rémy, Vidal, Julien   +2 more
core   +1 more source

Magnon Confinement on the Two-Dimensional Penrose Lattice: Perpendicular-Space Analysis of the Dynamic Structure Factor

Crystals
Employing the spin-wave formalism within and beyond the harmonic-oscillator approx-imation, we study the dynamic structure factors of spin-12 nearest-neighbor quantum Heisenberg antiferromagnets on two-dimensional quasiperiodic lattices with particular ...
Shoji Yamamoto, Takashi Inoue
doaj   +1 more source

Aperiodically ordered nano-graphene on the quasicrystalline substrate

New Journal of Physics, 2020
Designing exotic structures in low dimensions is key in today’s quest to tailor novel quantum states in materials with unique symmetries. Particularly intriguing materials in this regard are low dimensional aperiodic structures with non-conventional ...
M Maniraj, L Lyu, S Mousavion, S Becker, S Emmerich, D Jungkenn, D L Schlagel, T A Lograsso, S R Barman, S Mathias, B Stadtmüller, M Aeschlimann   +11 more
doaj   +1 more source

Identifying and Indexing Icosahedral Quasicrystals from Powder Diffraction Patterns

, 2001
We present a scheme to identify quasicrystals based on powder diffraction data and to provide a standardized indexing. We apply our scheme to a large catalog of powder diffraction patterns, including natural minerals, to look for new quasicrystals. Based
A. I. Goldman, A. P. Tsai, C. Janot, D. Levine, D. Levine, J. W. Cahn, Kenneth Deffeyes, Nan Yao, P. A. Bancel, Paul J. Steinhardt, Peter J. Lu, V. Elser   +11 more
core   +1 more source

Icosahedral quasicrystal and 1/1 cubic approximant in Au-Al-Yb alloys

, 2011
A P-type icosahedral quasicrystal is formed in Au-Al-Yb alloy of which 6-dimensional lattice parameter a6D = 7.448 {\AA}. The composition of the quasicrystal was analyzed to be Au51Al34Yb15.
Pearson WB, Shiro Kashimoto, Tsutomu Ishimasa, Yukinori Tanaka   +3 more
core   +1 more source

The Effect of Heat Treatment on the Phase Composition and Tribological Behavior of Thermally Sprayed Al-Based Quasicrystalline Coatings

Lubricants
Al-Cu-Fe quasicrystalline coatings were prepared using detonation spraying, followed by heat treatment at 450 °C for varying durations. Reciprocating sliding wear tests were conducted using an MTF-5000 tribological tester to investigate the tribological ...
Tong Xu, Siyang Gao, Deli Duan, Bowen Zheng, Yongchao Fang   +4 more
doaj   +1 more source

In situ TEM study of precipitation in a quasicrystal-strengthened AL-alloy

Archives of Metallurgy and Materials, 2017
Precipitation kinetics and mechanisms within an Al-Mn-Be-Cu quasicrystal strengthened alloy at 300°C were studied using in-situ transmission electron microscopy. The alloy was cast into a copper mould.
Bončina T., Zupanič F.
doaj   +1 more source

Phonon-phason coupling and nonlocal effects on Lamb waves in functionally graded one-dimensional hexagonal quasicrystal nanoplates

Results in Physics
Due to the coupled phonon-phason coupling and nonlocal effects, dynamic behaviors of quasicrystal nanostructures are highly complex. Mechanics investigations have mainly focused on the statics, but rarely on dynamics, thus limiting their engineering ...
Bo Zhang, Pei Liu, Yanwei Liu, Xinxin Wang, Jiangong Yu   +4 more
doaj   +1 more source

Self-Assembly of Monatomic Complex Crystals and Quasicrystals with a Double-Well Interaction Potential

, 2007
For the study of crystal formation and dynamics we introduce a simple two-dimensional monatomic model system with a parametrized interaction potential.
C. Janot, F. Lançon, F. Lançon, Hans-Rainer Trebin, J. Hafner, Michael Engel   +5 more
core   +1 more source

Synthesis of Star-Shaped Boron Carbide Micro-Crystallites under High Pressure and High Temperatures

Crystals, 2018
We synthesized star-shaped pentagonal microcrystals of boron carbide with an extremely low carbon content (~5%), from m-carborane under high pressure (7 GPa) and high temperature (1370⁻1670 K). These crystals have five-fold symmetry and grow in the
Vladimir P. Filonenko, Pavel V. Zinin, Igor P. Zibrov, Alexander S. Anokhin, Elena V. Kukueva, Sergey G. Lyapin, Vyacheslav Y. Fominski   +6 more
doaj   +1 more source