Microscopic Image of Lattice Vibrations (IMAGE)
Caption
Microscopic image of lattice vibrations in a two-dimensional crystal consisting of a monolayer of approx. 6,500 colloids. Deviations of particle positions from ideal lattice sites can be observed. If these deviations grow (logarithmically) with the system size beyond all limits, they are due to Mermin-Wagner fluctuations. In a three-dimensional crystal, particle distances are fixed and deviations are limited, irrespective of the size of the crystal.
Credit
University of Konstanz
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