Consider the cross-section of a bundle of closely packed SWCNTs of radius r, arranged into a two-dimensional triangular lattice with a lattice constant of 2r + h.
42.
Permalloys typically have the face centered cubic crystal structure with a lattice constant of approximately 0.355 nm in the vicinity of a nickel concentration of 80 %.
43.
Because ( ) and ( ) have almost the same lattice constant, the layers have very little induced strain, which allows them to be grown almost arbitrarily thick.
44.
Bandgaps can often be engineered by alloying, and Vegard's Law states that there is a linear relation between lattice constant and composition of a solid solution at constant temperature.
45.
Quaternary and higher compositions allow adjusting simultaneously the band gap and the lattice constant, allowing increasing radiant efficiency at wider range of wavelengths; for example AlGaInP is used for LEDs.
46.
A lattice remains unchanged only when we displace it by a particular distance ( integer times of lattice constant ), so a crystal has only " discrete translation symmetry ".
47.
For example, gallium arsenide, aluminium gallium arsenide, and aluminium arsenide have almost equal lattice constants, making it possible to grow almost arbitrarily thick layers of one on the other one.
48.
These regions of local curvature serve to elastically deform both the substrate and island, relieving accumulated strain and bringing the wetting layer and island lattice constant closer to its bulk value.
49.
The lattice constant _ that is, the distance between atoms in a crystal _ is different for these two materials, and the one with the larger constant is beneath the other.
50.
Aluminium indium arsenide is used e . g . as a buffer layer in metamorphic HEMT transistors, where it serves to adjust the lattice constant differences between the GaAs substrate and the GaInAs channel.
