Bulk Cuprate Candidate: (Ba₀.₆Sr₀.₄)₄Ca₂Cu₁₀Oᵧ

I am writing to share a structure-guided proposal for a novel bulk cuprate oxide candidate that may be of interest in the search for new high-Tc superconductors at ambient pressure.The material I am exploring is an oxygen-doped multilayer cuprate oxide derived from proven cuprate families, with the target compositional space centered on a Ba/Sr–Ca–Cu–O intergrowth design. The proposal is intentionally anchored to established structural motifs, especially YBa2Cu3O7−δ (the 123 phase) and HgBa2Ca2Cu3O8+δ (Hg-1223), in order to make the design chemically and structurally plausible rather than purely speculative. The main idea is to use Ba/Sr substitution, Ca-mediated interlayer coupling, and controlled oxygen content to explore a less-charted region of cuprate phase space while preserving the key ingredients that support superconductivity in known high-Tc materials.A one-page high-definition PDF of the project is attached. It is formatted as a single-page scientific poster and can be printed if you find it useful. I also made a realistic estimate of the superconducting behavior based on known cuprate trends rather than any unsupported prediction. On that basis, the material could plausibly be superconducting, but not necessarily at a very high temperature. The most realistic expectation is a Tc in the approximate range of 80–120 K at ambient pressure, with an upper realistic bound around 130 K if the structure, phase purity, and oxygen stoichiometry are exceptionally favorable. In other words, the proposal is scientifically grounded, but it should be treated as an exploratory candidate rather than a guaranteed route to room-temperature superconductivity.