Possible Superconductivity in the Doped Ladder Compound La1−xSrxCuO2.5

B. Normand; D. F. Agterberg; T. M. Rice

doi:10.1103/PhysRevLett.82.4296

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Possible Superconductivity in the Doped Ladder Compound La1−xSrxCuO2.5

B. Normand, D. F. Agterberg, T. M. Rice

DOI 10.1103/PhysRevLett.82.4296 · Physical Review Letters

T1

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Abstract

LaCuO2.5 is a system of coupled, two-chain, cuprate ladders which may be doped systematically by Sr substitution. Motivated by the recent synthesis of single crystals, we investigate theoretically the possibility of superconductivity in this compound. We use a model of spin-fluctuation-mediated superconductivity, where the pairing potential is strongly peaked at π in the ladder direction. We solve the coupled gap equations on the bonding and antibonding ladder bands to find superconducting solutions across the range of doping, and discuss their relevance to the real material.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1-xSrxCuO2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	onset
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38	Pressure not reported	unknown
La1.9Sr0.1CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	50	Pressure not reported	onset