Electronic phase diagram of La$_{1.875}$Ba$_{0.125-x}$Sr$_x$CuO$_4$

Details Electronic phase diagram of La$_{1.875}$Ba$_{0.125-x}$Sr$_x$CuO$_4$ Electronic phase diagram of La$_{1.875}$Ba$_{0.125-x}$Sr$_x$CuO$_4$

2000-10-02

arxiv.org/abs/cond-mat/0010024v2

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures, Proceeding paper of the Stripes2000 conference in Roma, Italy

Scientific paper

10.1142/S0217979200003629

We performed systematic measurements of magnetic susceptibility on single crystals of La$_{1.875}$Ba$_{0.125-x}$Sr$_x$CuO$_4$. The dependence of the superconducting transition temperature on Sr-concentration demonstrates a step-like pattern upon doping at {\it x}$\sim$0.08 as the crystal structure changes from low-temperature tetragonal (LTT) to low-temperature orthorhombic (LTO) phase at low temperature. Upon cooling, an anomalous upturn in the susceptibility was observed at the structural phase transition between the LTT-LTO phases under the magnetic field parallel to {\it c}-axis.

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