Away from the dislocation line
, the quasicrystal is perfect, as it would be with dislocations in periodic crystals.
He found the explanation by analyzing how silicons electronic structure changes when a dislocation line moves, he reports in the Sept.
Gilman argues that kinks along a dislocation line determine the rate of the line's movement.
Finally, unless the scattering vector is nearly perpendicular to a dislocation line
, no appreciable scattering is seen.
A cross-section of the crystal, normal to the dislocation lines
, can be subdivided into sub-areas of equal size and shape containing exactly the same number of dislocations.
Heat a sheet of metal or silicon enough to soften its brittleness, bend it ever so slightly, and tiny kinks, or dislocation lines, could form on the curved surface, looking somewhat like a series of speed bumps.
The million-dollar question is how fast those dislocation lines move in response to a given pressure and what impedes their motion.