Spin singlet and quasiparticles excitations in cuprate superconductors

M. Mezidi, A. Alekhin, G. D. Gu +5

We followed step by step the transition from an antiferromagnetic (AF) Mott insulator to a superconducting (SC) metal in the Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi-2212) cuprate using…