Electronic and Structural Properties of a 4d-Perovskite: Cubic Phase of SrZrO₃

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First-principles density functional calculations are performed within the local density approximation to study the electronic properties of SrZrO₃, an insulating 4d-perovskite, in its high-temperature cubic phase, above 1400 K, as well as the generic 3d-perovskite SrTiO₃, which is also a d⁰-insulator and cubic above 105 K, for comparison reasons. The energy bands, density of states and charge density distributions are obtained and a detailed comparison between their band structures is presented. The results are discussed also in terms of the existing data in the literature for both oxides.