Theoretical and experimental study of non-stoichiometric SrRuO3: a role of oxygen vacancies in electron correlation effects

Abstract

We present a theoretical and experimental study of the electronic structure of SrRuO₃ after introduction of vacancies. Theoretically, the modeling of non-stoichiometric variations of SrRuO₃ was performed by removing appropriate atoms or their combinations, whereas in the experiments the annealing treatment at moderate temperatures in ultra-high vacuum was applied. At comparison of the obtained results allows us to draw an important conclusion that the formation of oxygen vacancies may be closely related to the manifestation of strong correlation effects in SrRuO₃