ARPES Study of the Metal-Insulator Transition in Bismuth Cobaltates

Abstract

We present an angle-resolved photoemission spectroscopy (ARPES) study of a Mott-Hubbard-type bismuth cobaltate system across a metal-insulator transition. By varying the amount of Pb substitution, and by doping with Sr or Ba cation, a range of insulating to metallic properties is obtained. We observe a systematic change in the spectral weight of the coherent and incoherent parts, accompanied by an energy shift of the incoherent part. The band dispersion also shows the emergence of a weakly dispersing state at the Fermi energy with increasing conductivity. These changes correspond with the changes in the temperature-dependent resistivity behavior. We address the nature of the coherent-incoherent parts in relation to the peak-dip-hump feature seen in cuprates superconductors.

References in corpus (16)

• Missing Quasiparticles and the Chemical Potential Puzzle in the Doping Evolution of the Cuprate Superconductors
• The Hubbard Model at Infinite Dimensions: Thermodynamic and Transport Properties
• Fermi surface and quasiparticle dynamics of Na(x)CoO2 {x=0.7} investigated by Angle-Resolved Photoemission Spectroscopy
• Coherence-Incoherence and Dimensional Crossover in Layered Strongly Correlated Metals
• Doubling of the bands in overdoped Bi2Sr2CaCu2O8-probable evidence for c-axis bilayer coupling
• ARPES on Na${}_{0.6}$CoO${}_2$: Fermi surface, extended flat dispersion, and unusual band splitting
• The Finite Temperature Mott Transition in the Hubbard Model in Infinite Dimensions
• Physical properties of misfit-layered (Bi,Pb)-Sr-Co-O system: Effect of hole doping into triangular lattice formed by low-spin Co ions
• ARPES study of Pb doped Bi_2Sr_2CaCu_2O_8 - a new Fermi surface picture
• Ferromagnetism and large negative magnetoresistance in Pb doped Bi-Sr-Co-O misfit-layer compound
• Quasiparticle Liquid in the Highly Overdoped Bi2212
• Hall effect and conduction anisotropy in the organic conductor TMTSF2PF6
• Dispersion Anomalies in Bilayer Cuprates and the Odd Symmetry of the Magnetic Resonance
• Nature of the Electronic Excitations near the Brillouin Zone Boundary of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Surface characterization and surface electronic structure of organic quasi-one-dimensional charge transfer salts
• Nature of Correlated Motion of Electrons in the Parent Cobaltate Superconductors

Cited by in corpus (1)

• Novel electronic structure induced by a highly strained oxide interface with incommensurate crystal fields