Mu-Yong Choi, P.M. Chaikin, et al.
Solid State Communications
Paper
Evidence for Electron-Electron Correlations in Pure and Sr-Doped La2CuO4
Abstract
SQUID susceptibility measurements on La2CuO4 and La2-xSrxCuO4 provide evidence for electron-electron correlations. Our data suggest that La2CuO4 has a spin-density wave (or antiferromagnetic) transition near 250 K. The Sr doped superconductors have a Pauli susceptibility in the normal state that is enhanced by electron-electron correlations. The variation in the superconducting Tc with Sr doping is not directly correlated with the change in electron density of states. © 1987 The Japan Society of Applied Physics.
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