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On the Theory of Plasmon Dispersion in Electron-Doped Cuprates

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dc.contributor.author Eremin M.
dc.contributor.author Kochergin D.
dc.date.accessioned 2019-01-22T20:32:40Z
dc.date.available 2019-01-22T20:32:40Z
dc.date.issued 2018
dc.identifier.issn 0021-3640
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/147644
dc.description.abstract © 2018, Pleiades Publishing, Inc. An explicit expression for the dynamic charge susceptibility for electron-doped cuprates has been derived. This expression accurately reproduces the wave vector dependence of the plasmon frequency observed in inelastic X-ray scattering experiments for Nd2 – xCexCuO4. The imaginary part of the charge susceptibility along the triangular path in the Brillouin zone is plotted. It is demonstrated that the spectral weight of the plasmon mode near q = 0 is negligibly low. The calculated frequencies of the plasmon mode for all wave vectors in the Brillouin zone turn out to lie outside the range of damping related to electron−hole excitations. A formula for the charge susceptibility is derived within the t−t′−t″−J model supplemented by the Coulomb interaction operator and three-site terms. The derivation is performed by the Green’s function technique employing the formalism of composite Hubbard operators and the Mori projection method, which have proved themselves in the analysis of collective spin excitations. The used Fourier transform of the Coulomb interaction corresponds to the monolayer model with a spatially periodic structure, which is embedded in a three-dimensional crystal lattice.
dc.relation.ispartofseries JETP Letters
dc.title On the Theory of Plasmon Dispersion in Electron-Doped Cuprates
dc.type Article
dc.relation.ispartofseries-issue 2
dc.relation.ispartofseries-volume 108
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 132
dc.source.id SCOPUS00213640-2018-108-2-SID85053901683


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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