Bulk screening in core level photoemission from Mott-Hubbard and Charge-Transfer systems

Abstract

We report bulk-sensitive hard X-ray ($h\nu$ = 5.95 KeV) core level photoemission spectroscopy (PES) of single crystal V${}_{1.98}$Cr${}_{0.02}$O${}_3$ and the high-$T_c$ cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi2212). V${}_{1.98}$Cr${}_{0.02}$O${}_3$ exhibits low binding energy "satellites" to the V $2p$ "main lines" in the metallic phase, which are suppressed in the antiferromagnetic insulator phase. In contrast, the Cu $2p$ spectra of Bi2212 do not show temperature dependent features, but a comparison with soft X-ray PES indicates a large increase in the $2p^{5}3d^9$ "satellites" or $3d^9$ weight in the bulk. Cluster model calculations, including full multiplet structure and a screening channel derived from the coherent band at the Fermi energy, give very satisfactory agreement with experiments.

References in corpus (9)

• Mott-Hubbard Metal-Insulator Transition in Paramagnetic V_2O_3: a LDA+DMFT(QMC) Study
• Prominent quasi-particle peak in the photoemission spectrum of the metallic phase of V_2O_3
• Nature of Well-Screened State in Hard X-ray Mn 2$p$ Core-Level Photoemission of La${}_{1-x}$Sr${}_x$MnO${}_3$ Films
• Orbital occupation, local spin and exchange interactions in V2O3
• Core-Level X-Ray Photoemission Satellites in Ruthenates: A New Mechanism Revealing the Mott Transition
• Electric-octupole and pure-electric-quadrupole effects in soft-x-ray photoemission
• Electronic Structure and Phase Transition in V2O3: Importance of 3d Spin-Orbit Interaction and Lattice Distortion
• Bulk Electronic structure of Na${}_{0.35}$CoO${}_2$.1.3H${}_2$O
• Cuprate core level line shapes for different Cu-O networks

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