Abstract
The electronic structures of SrRu1−xIrxO3 films (0≤x≤1) have been investigated by employing polarization-dependent soft X-ray absorption spectroscopy. In SrIrO3, the coherent quasi-particle peak at the Fermi level (EF) is clearly observed, reflecting the spin-orbit-coupled correlated metallic nature of SrIrO3. X-ray linear dichroism signals for x=0 and x=1 are negligibly weak, demonstrating the pseudo-cubic structure for SrRuO3 and the strong spin-orbit coupling in SrIrO3. In contrast, finite linear dichroism is observed for the intermediate x regime, indicating that the narrow dxz↓ and dyz↓ bands close to EF are occupied less than the wide dxy↓ band due to the enhanced in-plane hopping.
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