Manifestation of Correlation Effects in the photoemission spectra of Ca${}_{1-x}$Sr${}_x$RuO${}_3$

Abstract

We have measured soft x-ray photoemission and O 1{\it s} x-ray absorption spectra of Ca${}_{1-x}$Sr${}_x$RuO${}_3$ thin films prepared {\it in situ}. The coherent and incoherent parts have been identified in the bulk component of the photoemission spectra, and spectral weight transfer from the coherent to the incoherent part has been observed with decreasing $x$, namely, with increasing orthorhombic distortion. We propose that, while the Ru 4d one-electron bandwidth does not change with $x$, the distortion and hence the splitting of the $t_{2\text{g}}$ band effectively increases electron correlation strength. Although strong mass enhancement is found in the electronic specific heat data, the coherent part remains wide, suggesting enhanced band narrowing only in the vicinity of {\it E${}_F$}.

References in corpus (9)

• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• Mott transition and suppression of orbital fluctuations in orthorhombic 3$d^1$ perovskites
• Electronic structure and magnetism in Ru based perovskites
• Mutual Experimental and Theoretical Validation of Bulk Photoemission Spectra of Sr1-xCaxVO3
• Hole-doping-induced changes in the electronic structure of La${}_{1-x}$Sr${}_x$FeO${}_3$ : soft x-ray photoemission and absorption study of epitaxial thin films
• Core-Level X-Ray Photoemission Satellites in Ruthenates: A New Mechanism Revealing the Mott Transition
• Evolution of spectral function in a doped Mott insulator : surface vs. bulk contributions
• Spectral evolution in (Ca,Sr)RuO_3 near the Mott-Hubbard transition
• Quasi-particle spectra of perovskites: Enhanced Coulomb correlations at surfaces

Cited by in corpus (28)

• The nature of Itinerant Ferromagnetism of SrRuO3 : A DFT+DMFT Study
• Electronic correlations and Hund's coupling effects in SrMoO${}_3$ revealed by photoemission spectroscopy
• Evolution of a band insulating phase from a correlated metallic phase
• Soft x-ray magnetic circular dichroism study of Ca_1-xSr_xRuO_3 across the ferromagnetic quantum phase transition
• Observation of spin-dependent dual ferromagnetism in perovskite ruthenates
• Structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films prepared by molecular beam epitaxy: comparison with stoichiometric SrRuO3
• Electronic structure, cohesive properties and magnetism of SrRuO${}_3$; a theoretical investigation
• Site dilution in SrRuO${}_3$: Effects on structural and magnetic properties
• Quasiparticle self-consistent GW calculation of Sr${}_2$RuO${}_4$ and SrRuO${}_3$:
• Magnetic ground state of SrRuO${}_3$ thin film and applicability of standard first-principles approximations to metallic magnetism
• Effects of Cr substitution on the magnetic and transport properties and electronic states of SrRuO3 epitaxial thin films
• Isotropic orbital magnetic moments in magnetically anisotropic SrRuO3 films
• Ferromagnetic cluster-glass state in itinerant electron system Sr1-xLaxRuO3
• Non-Fermi-liquid behavior in cubic phase BaRuO${}_3$: A dynamical mean-field study
• Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7
• Electronic and magnetic properties of epitaxial SrRhO3 films
• Muon Spin Relaxation and Neutron Diffraction Studies of Cluster-Glass States in Sr1-xLaxRuO3
• Electronic properties in itinerant ferromagnet SrRu${}_{1-x}$Ti${}_x$O${}_3$
• Electronic structure of ternary palladates and effect of hole doping: A valence band photoemission spectroscopic study
• Orbital-selective metal skin induced by alkali-metal-dosing Mott-insulating Ca${}_2$RuO${}_4$
• Correlation effect in Sr${}_{1-x}$La${}_x$RuO${}_3$ studied by soft x-ray photoemission spectroscopy
• Evolution of the electronic structure across the filling-control and bandwidth-control metal-insulator transitions in pyrochlore-type Ru oxides
• Evidence of electron correlation and weak bulk plasmon in SrMoO${}_3$
• Photoemission and Dynamical Mean Field Theory Study of Electronic Correlation in a $t_{2g}^5$ Metal of SrRhO${}_3$ Thin Film
• SrRuO3 under tensile strain: Thickness-dependent electronic and magnetic properties
• Single monolayer ferromagnetic perovskite SrRuO3 with high conductivity and strong ferromagnetism
• Correlated Ligand Electrons in the Transition-Metal Oxide SrRuO${}_3$
• Origin of dimensional crossover in quasi-one-dimensional hollandite K${}_2$Ru${}_8$O${}_{16}$