Rotons and Ghost Plasmons in Binary and Ternary Ionic Mixtures
Askaruly A. Ashikbayeva A.B. Davletov A.E. Syzganbayeva S.A. Yerimbetova L.T. Pirogov I.D. Filinov A.V. Arkhipov Y.V. Tkachenko I.M.
October 2025John Wiley and Sons Inc
Contributions to Plasma Physics
2025#65Issue 8-9
Dynamic properties of two important exanples of binary and ternary ionic mixtures are studied using the self-consistent version of the method of moments. It is determined that in a (Formula presented.) mixture the lifetime of the roton branch of the system plasmon-roton mode is comparable or even shorter than the mode period, that is, that this branch is virtual or strongly decaying. In the ternary mixture (Formula presented.) this branchs decrement is found to be smaller than its frequency, so that it becomes observable. Conditions are established for the mixture dielectric function to lose its analyticity in the complex frequency upper half-plane, and the relative contributions to the (Formula presented.) sum rule of the unique pole located on the positive part of the imaginary axis called the “ghost plasmon” and of other two poles located in the lower half-plane are found.
dense binary and ternary ion mixtures , ghost plasmons , method of moments , plasmons , rotons
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Department of Physics and Technology, IETP, al-Farabi Kazakh National University, Almaty, Kazakhstan
Christian-Albrechts-Universitat zu Kiel, Kiel, Germany
Departamento de Matemática Aplicada, Universitat Politècnica de València, Valencia, Spain
Department of Physics and Technology
Christian-Albrechts-Universitat zu Kiel
Departamento de Matemática Aplicada
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