Role of orbital selectivity on crystal structures and electronic states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>BiMnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LaMnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> perovskites

Correlated oxides, such as ${\mathrm{BiMnO}}_{3}$ and ${\mathrm{LaMnO}}_{3}$, show a complex interplay of electronic correlations crystal structure exhibiting multiple first-order phase transitions, some without clear order parameter. The quantitative theoretical description this temperature-dependent electronic-structural in the vicinity Mott transition is still challenge. Here we address issue by simultaneously considering both structural degrees freedom, within self-consistent density functional theory with embedded dynamical mean field theory. Our results existence novel states characterized coexistence insulating, semimetallic, metallic orbitals. This state agreement resonant x-ray scattering. We also that entropy plays decisive role transitions. By determination corresponding structure, temperature evolution these phases can be quantitatively explained from first principles, thus demonstrating predictive power method for properties.