Superconductivity in zigzag CuO chains

Abstract

Superconductivity has recently been discovered in Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ with a maximum $T_c$ of about 15K. Since the CuO planes in this material are believed to be insulating, it has been proposed that the superconductivity occurs in the double (or zigzag) CuO chain layer. On phenomenological grounds, we propose a theoretical interpretation of the experimental results in terms of a new phase for the zigzag chain, labelled by C${}_1$S${}_{3/2}$. This phase has a gap for some of the relative spin and charge modes but no total spin gap, and can have a divergent superconducting susceptibility for repulsive interactions. A microscopic model for the zigzag CuO chain is proposed, and on the basis of density matrix renormalization group (DMRG) and bosonization studies of this model, we adduce evidence that supports our proposal.

10 pages, 5 figures; Journal-ref. added

References in corpus (16)

• Dimerization and Incommensurate Spiral Spin Correlations in the Zigzag Spin Chain: Analogies to the Kondo Lattice
• Spin-ladders with spin gaps: A description of a class of cuprates
• Antiferromagnetic spin ladders: crossover between spin S = 1/2 and S = 1 chains
• Weak Coupling Phase Diagram of the Two Chain Hubbard Model
• Incommensurate spin correlations in Heisenberg spin-1/2 zig-zag ladders
• Non-perturbative approach to Luttinger's theorem in one dimension
• Friedel Oscillations and Charge Density Waves in Chains and Ladders
• Dimensional Crossover in Quasi One-Dimensional and High T_c Superconductors
• Strongly reduced gap in the zigzag spin chain with a ferromagnetic interchain coupling
• Competing Orders in Coupled Luttinger Liquids
• Superconductivity in Pr2Ba4Cu7O15-delta with metallic double chains
• On the metal-insulator transition in the two-chain model of correlated fermions
• Superconductivity in a spin liquid - a one dimensional example
• Superconductivity due to spin fluctuations originating from multiple Fermi surfaces in a double chain superconductor Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$}
• Superconductivity in the CuO double chain of Pr_2Ba_4Cu_7O_15-delta on the basis of Tomonaga-Luttinger liquid theory
• Filling-dependence of the zigzag Hubbard ladder for a quasi-one-dimensional superconductor Pr_2Ba_4Cu_7O_{15-delta}

Cited by in corpus (6)

• Anomalies in the Fermi surface and band dispersion of quasi-one-dimensional CuO chains in the high-temperature superconductor YBa2Cu4O8
• Synthesis of high-oxidation Y-Ba-Cu-O phases in superoxygenated thin films
• Electronic States and Superconducting Transition Temperature based on the Tomonaga-Luttinger liquid in Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$
• Topological Confinement and Superconductivity
• Ground-State Properties of the $t$-$J$ Model for the CuO Double-Chain Structure
• Theoretical analysis of the origin of the double-well band dispersion in the CuO double chains of Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ and its impact on superconductivity