In-plane resistivity and Hall effect data of La$_{2-x}$Sr$_{x}$CuO$_{4}$ in high magnetic fields

The effects of stoichiometry (Sr concentration in La$_{2-x}$Sr$_{x}$CuO$_{4 }$- LSCO) are of extreme interest in exploring the phase space of high-temperature superconductivity (HTS). Carrier doping in LSCO is determined by the Sr concentration rather than non-stoichiometric oxygen, thus controlling the carrier concentration in LSCO tends to be easier than in the other HTS cuprates. Nevertheless, precise control of Sr at a precision greater than 0.005 is extremely difficult using existing single crystal growth techniques. We use our unique MBE growth chamber to grow combinatorial thin films of LSCO with a uniform gradient of Sr concentration across a single substrate. Intense magnetic fields suppress superconductivity, revealing the underlying normal state to temperatures below 0.3K. We report the Hall effect and resistivity with an extremely fine $\sim $x=0.0002 Sr resolution in fields up to 60T.