Tanatar, BilalOral, A.2016-02-082016-02-0820000953-2048http://hdl.handle.net/11693/25029We study the collective modes of flux line liquids such as occur in the type-II superconductors of recent interest composed of two-dimensional layered structures. Starting from the vortex-vortex interaction and employing the dielectric formalism within the random-phase approximation, we find propagating sound modes in the long-wavelength limit.EnglishApproximation theoryBarium compoundsDielectric materialsMagnetic fieldsMagnetic fluxOxide superconductorsSuperconductivityDielectric formalismFlux line liquidsRandom phase approximationVortex-vortex interactionSuperconducting materialsArticle10.1088/0953-2048/13/7/310