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A quasiperiodic crystal, or quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. [2]
Quasiperiodic behavior is almost but not quite periodic. [2] The term used to denote oscillations that appear to follow a regular pattern but which do not have a fixed period. The term thus used does not have a precise definition and should not be confused with more strictly defined mathematical concepts such as an almost periodic function or a ...
A quasiperiodic crystal, or, in short, quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. [25] "
Quasicrystals are quasiperiodic structures with an arrangement described by a sum of two or more periodic functions whose periods have a ratio equal to an irrational number; so, they are precisely described like a crystal but in a non-repeating pattern, like a glass.
In mathematics, a quasiperiodic function is a function that has a certain similarity to a periodic function. [1] A function f {\displaystyle f} is quasiperiodic with quasiperiod ω {\displaystyle \omega } if f ( z + ω ) = g ( z , f ( z ) ) {\displaystyle f(z+\omega )=g(z,f(z))} , where g {\displaystyle g} is a " simpler " function than f ...
Another class of quasiperiodic superlattices is named after Fibonacci. A Fibonacci superlattice can be viewed as a one-dimensional quasicrystal, where either electron hopping transfer or on-site energy takes two values arranged in a Fibonacci sequence.
A quasiperiodic motion can be expressed as a function of time whose value is a vector of "quasiperiodic functions". A quasiperiodic function f on the real line is a function obtained from a function F on a standard torus T (defined by n angles), by means of a trajectory in the torus in which each angle increases at a constant rate. [ 7 ]
A quasiperiodic tiling is a tiling of the plane that exhibits local periodicity under some transformations: every finite subset of its tiles reappears infinitely often throughout the tiling, but there is no nontrivial way of superimposing the whole tiling onto itself so that all tiles overlap perfectly.