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We consider the mass-imbalanced sensibility for the emergence of vortexpatterns in the Bose-Einstein condensed binary mixture of rubidium-cesium($^{85}$Rb-$^{133}$Cs), confined in quasi-two-dimensional harmonic traps, withone species linearly perturbed in one direction. Non-dipolar coupled speciesare chosen to highlight mass symmetry effects. We first analyze the condensedmixture in the unperturbed non-rotating regime, where radial phase separationis verified in the immiscible regime, which occurs for large ratio betweeninter- and intra-species repulsive interactions. By going to the linearperturbed regime, the radial phase separation that occurs in the immisciblecondition splits up with the two densities having their maxima at distinctpositions. In the rotating regime of both unperturbed and perturbed cases, theminimum rotation is determined in terms of the inter-species interaction toobserve vortex structures. In the immiscible regime a dramatic spatialinterchange between the species is verified by increasing the rotation.

Mass-imbalanced Bose-Einstein condensed mixtures in rotating perturbed trap