Electronic phase diagram of La2−xSrxCuO4 Original Research Article

In this article, we discuss the electronic phase diagram of a high-Tc cuprate La2−xSrxCuO4; namely, how the electronic property changes as functions of temperature T and hole-doping level p. In particular, we focus on four crossover lines, which can be seen in the T dependences of uniform magnetic susceptibility and electronic specific heat. One of them is crossover line Ta(p) in the low doping region below p∼0.05 near the margin of the superconducting regime, which is associated with strongly developed antiferromagnetic (AF) spin correlations within the Cu–O planes. The others are crossover lines Tmax(p), T∗(p) and Tsf(p) in the normal state in the superconducting regime (0.05