Tuning quantum paramagnetism and d-wave superconductivity in single-layer iron chalcogenides by chemical pressure

Qiang Zou, Basu Dev Oli, Huimin Zhang +4

By substituting S into single-layer FeSe/SrTiO3, chemical pressure is applied to tune its paramagnetic state that is modeled as an incoherent superposition of spin-spiral states. T…