2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/70183We consider the standing wave solutions of the three dimensional semilinear Schrodinger equation with competing potential functions $V$ and $K$ and under the action of an external electromagnetic vector field $A$. We establish some necessary conditions for a sequence of such solutions to concentrate, in two different senses, around a given point. In the particular but important case of nonlinearities of power type, we prove that the spikes locate at the critical points of a smooth ground energy map independent of $A$.Final revision, accepted for publicationAnalysis of PDEs35J65, 35Q40, 35Q55, 83C50text