Comment on “Electronic structure of a spherical quantum dot: Effects of the Kratzer potential, hydrogenic impurity, external electric and magnetic fields”

We argue that the Kratzer potential is unsuitable for the description of an electron in a spherical quantum dot. We show that the authors failed to derive the correct interaction between the electron and the electric field. Besides, they omitted a term in the interaction between the electron and the magnetic field that does not appear to be negligible.Fil: Fernández, Francisco Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentin