Theory of energy relaxation in a two-dimensional electronic crystal at liquid helium surface
Yu. P. MonarkhaInstitute of Solid State Physics, Academy of Sciences of the USSR, ChernogolovkaV. B. ShikinInstitute of Solid State Physics, Academy of Sciences of the USSR, Chernogolovka
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Abstract
A theory of energy relaxation in a two-dimensional Wigner crystal at the free liquid helium surface is constructed. The energy relaxation time of surface electrons is calculated by using the self-consistent theory of coupled, phonon-ripplon modes for describing the dynamic form factor of the crystal. It is shown that this time is determined by processes in which a transverse phonon of the two-dimensional lattice is transformed into a pair of short-wave ripplons. The theory is compared with the available experimental results.
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