Superconductivity in a unique type of copper oxide

Abstract

The mechanism of superconductivity in cuprates remains one of the big challenges of condensed matter physics.High Tc cuprates crystallize into layered perovskite structure featuring copper oxygen octahedral coordination. Due to the Jahn Teller effect in combination with the strong static Coulomb interaction, the octahedra in high Tc cuprates are elongated along the c axis, leading to a 3dx2-y2 orbital at the top of the band structure wherein the doped holes reside.This scenario gives rise to two dimensional characteristics in high Tc cuprates that favor d wave pairing symmetry. Here we report superconductivity in a cuprate Ba2CuO4-y wherein the local octahedron is in a very exceptional compressed version.The Ba2CuO4-y compound was synthesized at high pressure at high temperatures, and shows bulk superconductivity with critical temperature Tc above 70 K at ambient conditions. This superconducting transition temperature is more than 30 K higher than the Tc for the isostructural counterparts based on classical La2CuO4. X-ray absorption measurements indicate the heavily doped nature of the Ba2CuO4-y superconductor. In compressed octahedron the 3d3z2-r2 orbital will be lifted above the 3dx2-y2 orbital, leading to significant three dimensional nature in addition to the conventional 3dx2-y2 orbital. This work sheds important new light on advancing our comprehensive understanding of the superconducting mechanism of high Tc in cuprate materials.

Total 28 pages incuding 9 Figures

References in corpus (10)

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• Band-structure trend in hole-doped cuprates and correlation with Tcmax
• Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES
• Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
• Nodeless pairing in superconducting copper-oxide monolayer films on Bi2Sr2CaCu2O8+δ
• Orbital mixture effect on the Fermi surface-$T_c$ correlation in the cuprate superconductors --- bilayer vs single layer
• Nodeless high-T${}_c$ superconductivity in highly-overdoped monolayer CuO${}_2$
• Different doping from apical and planar oxygen vacancies in Ba${}_2$CuO${}_{4-\delta }$ and La${}_2$CuO${}_{4-\delta }$
• Two-dimensional topological superconducting phases emerged from d-wave superconductors in proximity to antiferromagnets
• Bulk superconductivity at 84 K in the strongly overdoped regime of cuprates

Cited by in corpus (42)

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• The s${}^{\pm }$-Wave Pairing and the Destructive Role of Apical-Oxygen Deficiencies in La${}_3$Ni${}_2$O${}_7$ Under Pressure
• Superconductivity in infinite-layer nickelates
• Cuprate superconductors as viewed through a striped lens
• Ni-based transition-metal trichalcogenide monolayer: a strongly correlated quadruple-layer graphene
• Superconducting mechanism for the cuprate Ba${}_2$CuO${}_{3+\delta }$ based on a multiorbital Lieb lattice model
• Modulation of the Octahedral Structure and Potential Superconductivity of La${}_3$Ni${}_2$O${}_7$ through Strain Engineering
• Relevance of Cu-3d multiplet structure in models of high Tc cuprates
• First-principles study of the superconductivity in LaO
• Designing nickelate superconductors with $d^8$ configuration exploiting mixed-anion strategy
• Effect of realistic out-of-plane dopant potentials on the superfluid density of overdoped cuprates
• In-plane ordering of O vacancies in a high-Tc cuprate superconductor with compressed Cu-O octahedrons: a first-principles cluster expansion study
• Kuramoto synchronization of quantum tunneling polarons for describing the dynamic structure in cuprate superconductors
• Electronic structure and two-band superconductivity in unconventional high-$T_c$ cuprates Ba${}_2$CuO${}_{3+\delta }$
• Proposed ordering of textured spin singlets in a bulk infinite layer nickelate
• $d$-wave and $s^{\pm }$ Pairing Strengths in Ba${}_2$CuO${}_{3+\delta }$
• t-J model on the effective brick-wall lattice for the recently discovered high-temperature superconductor Ba${}_2$CuO${}_{3+\delta }$
• Electronic correlation-driven orbital polarization transitions in the orbital-selective Mott compound Ba${}_2$CuO${}_{4-\delta }$
• Theoretical Prediction of High-Temperature Superconductivity in SrAuH${}_3$ at Ambient Pressure
• Hidden, one-dimensional, strongly nested, and almost half-filled Fermi surface in Ba${}_2$CuO${}_{3+y}$ superconductors
• Superconducting dome with $extended$ $s$-$wave$ pairing symmetry in the heavily hole-overdoped copper-oxide planes
• Two-band Conduction and Nesting Instabilities in Superconducting Ba${}_2$CuO${}_{3+\delta }$: a First Principles Study
• From high-$T_c$ to low-$T_c$: Multi-orbital effects in transition metal oxides
• Crystalline and magnetic structure of Ba2CuO3+δ investigated by x-ray absorption spectroscopy and resonant inelastic x-ray scattering
• Unusual Low-Energy Collective Charge Excitations in High-$T_c$ Cuprate Superconductors
• Percolative Superconductivity in Electron-Doped Sr${}_{1-x}$Eu${}_x$CuO${}_{2+y}$ Films
• Theoretical study of spin-fluctuation-mediated superconductivity in two-dimensional Hubbard models with an incipient flat band
• Scale free distribution of oxygen interstitials wires in optimum doped HgBa${}_2$CuO${}_{4+y}$
• Lattice Quantum Geometry Controlling 118 K Multigap Superconductivity in Heavily Overdoped CuBa2Ca3Cu4O10+d
• Flat bands in condensed-matter systems -- perspective for magnetism and superconductivity
• Second Dome of Superconductivity in YBa${}_2$Cu${}_3$O${}_7$ at High Pressure
• Band crossover and magnetic phase diagram of high-Tc superconducting compound Ba2CuO4-δ
• Tunable surface electron gas and effect of phonons in Sr${}_2$CuO${}_3$: A first-principles study
• Inversion symmetry breaking in bilayer multi-orbital Hubbard model with impurity approximation
• Nodeless $s$-Wave Superconducting Phases in Cuprates with Ba${}_2$CuO${}_3$-Type Structure
• Correlated electronic structure of high-temperature superconductor Ba${}_2$CuO${}_{3+\delta }$
• Ternary nickel hydrides: a new platform for unconventional superconductivity and quantum magnetism
• An emergent quasi-2D metallic state derived from the Mott insulator framework
• 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
• Absence of two-orbital superconductivity in cuprate family: A DFT+DMFT perspective
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems