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Structural instabilities of a two-dimensional Wigner crystal in a lateral superlattice

✍ Scribed by A.O. Govorov

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
68 KB
Volume
24
Category
Article
ISSN
0749-6036

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✦ Synopsis

We consider the instability of a two-dimensional Wigner crystal in a short-period lateral superlattice. To find instabilities, we calculate the phonon spectrum of the electron lattice deformed by a periodic potential. We show that one of the transverse modes of the deformed electron crystal becomes soft when the electron density exceeds a critical value. This can result in a phase transition with the formation of a charge-density wave.

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