Unveiling the Source of High Superconducting Critical Temperatures in Trilayer Cuprates

Researchers have conducted a study to understand the high superconducting critical temperatures (Tc) observed in trilayer cuprates. By using high-resolution angle-resolved photoemission measurements on the three-layer cuprate superconductor Bi2223, they observed the trilayer splitting of the Fermi surface for the first time. The study revealed the electronic origin of the high Tc exhibited by these materials and highlighted the value of the composite picture theory in guiding the design and search for new superconductors with high Tc.