Angle-resolved photoemission study of insulating and metallic Cu-O chains in PrBa${}_2$Cu${}_3$O${}_7$ and PrBa${}_2$Cu${}_4$O${}_8$

Abstract

We compare the angle-resolved photoemission spectra of the hole-doped Cu-O chains in PrBa${}_2$Cu${}_3$O${}_7$ (Pr123) and in PrBa${}_2$Cu${}_4$O${}_8$ (Pr124). While, in Pr123, a dispersive feature from the chain takes a band maximum at $k_b$ (momentum along the chain) $\sim$ $\pi /4$ and loses its spectral weight around the Fermi level, it reaches the Fermi level at $k_b$ $\sim$ $\pi /4$ in Pr124. Although the chains in Pr123 and Pr124 are approximately 1/4-filled, they show contrasting behaviors: While the chains in Pr123 have an instability to charge ordering, those in Pr124 avoid it and show an interesting spectral feature of a metallic coupled-chain system.

4 pages, 5 figures, to be published in PRL

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• Charge Freezing in Zig-zag Chain Cuprates PrBa2Cu4O8 Observed by Cu Nuclear Quadrupole Resonance
• Superconductivity in the CuO double chain of Pr_2Ba_4Cu_7O_15-delta on the basis of Tomonaga-Luttinger liquid theory
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• Fragile three-dimensionality in the quasi-one-dimensional cuprate PrBa_2Cu_4O_8
• Irradiation-induced confinement in a quasi-one-dimensional metal
• Photoinduced charge carrier dynamics in Hubbard two-leg ladders and chains
• Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$
• Enhanced superconducting properties of double-chain based superconductor Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ synthesized by citrate pyrolysis technique
• Nuclear-spin evidence of insulating and antiferromagnetic state of CuO2 planes in superconducting Pr2Ba4Cu7O15-δ
• Crystal structures and superconducting properties of metallic double-chain based cuprate Pr2Ba4Cu7O15-delta
• Thermodynamic Properties of Superconducting and Non-Superconducting Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ Compounds with Metallic Double Chains
• Coexistence of superconductivity and incoherence in quasi 1D chains