First principles investigation of Na doping effects on the structural, magnetic, and electronic properties in SrRuO3

- Na doping cannot induce ferromagnetic transition in SrRuO3, lead to a reduction of magnetic moment.
- The decrease of valance bandwidth and conduct bandwidth due to the distortion of the RuO6.
- Na doping lower the density of states at Fermi lever and decrease the number of electrons.
- All structures remain metallic, the metal-insulator transition has not happened.