Quasi-two-dimensional Wigner crystals with a compound lattice
Y. M. VilkPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. P. MonarkhaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
Аннотация
We demonstrate that it is possible to create a two-dimensional Wigner crystal with a compound lattice in a He3−He4 solution with microlayering or on a superfluid helium film covering a very smooth solid substrate. We show that a compound lattice is formed through the interaction of two planar Wigner lattices of the same charge located one above the other and separated by a finite distance. A theoretical analysis of the stability of such crystals shows that various structural transitions must occur in the system when the distance between the layers is changed.
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