The second reservoir we introduce, a tunable artificial crystal, is constructed by periodic arrays of circuit elements of Josephson junction .
Systems with the forbidden bands in the structured reservoirs such as omnidirectional wave-guides , tunable artificial crystals [18, 19], and frequency dispersive media  are also suitable for the realization of these non-Markovian dynamics.
Kyocera Kinseki is a major crystal device manufacturer which develops and manufactures artificial crystal
and crystal-applied products including crystal units, crystal oscillators, SAW filters, optical devices, etc.
Those particles (distorted shapes) surrounding defects within the artificial crystal
lattice became disordered at a lower temperature than the other particles did.
On Earth its artificial crystal
form is known as carborundum.
It does, however, illustrate the danger of contaminating the scientific knowledge base when artificial crystal specimens are created purposely to mimic natural specimens.
Samples of natural and artificial crystals were tested as follows.
Phononic Crystals: Artificial Crystals
for Sonic, Acoustic, and Elastic Waves
The team has used the database to identify 28 topological insulators, artificial crystals
that are able to conduct electrical current on their surfaces, while acting as insulators throughout the interior of the crystal.
The photonic crystals are artificial crystals
that have two- and three-dimensional periodic structures with high refractive index contrast, for efficient filtering of different wavelengths of light.
Researchers from AT&T Bell Laboratorieshave developed a technique enabling them to construct novel artificial crystals
that could soon lead to the first silicon-based light-emitting devices.