Two-phonon scattering of magnetorotons in fractional quantum Hall liquids
Apalkov, V.M.; Portnoi, M.E.
Date: 2002
Journal
Physical Review B
Publisher
American Physical Society
Publisher DOI
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Abstract
We study the phonon-assisted process of dissociation of a magnetoroton, in a fractional quantum Hall liquid, into an unbound pair of quasiparticles. Whilst the dissociation is forbidden to first order in the electron-phonon interaction, it can occur as a two-phonon process. Depending on the value of final separation between the ...
We study the phonon-assisted process of dissociation of a magnetoroton, in a fractional quantum Hall liquid, into an unbound pair of quasiparticles. Whilst the dissociation is forbidden to first order in the electron-phonon interaction, it can occur as a two-phonon process. Depending on the value of final separation between the quasiparticles, the dissociation is either a single event involving the absorption of one phonon and the emission of another phonon of similar energy, or a two-phonon diffusion of a quasiexciton in momentum space. The dependence of the magnetoroton dissociation time on the filling factor of the incompressible liquid is found.
Physics and Astronomy
Faculty of Environment, Science and Economy
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