Breakthrough in 30-Year Superconductivity Mystery
New research applying shear strain to ultrathin crystals of strontium ruthenate (Sr₂RuO₄) found that its superconducting transition temperature remains almost unchanged, challenging previous theories and suggesting a simpler, one-component superconducting state. This study refines understanding of the material's hidden symmetry and opens new avenues for exploring unconventional superconductors.