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

ORAL

Abstract

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.

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Authors

  • Scott Riggs

    • National High Magnetic Field Laboratory, DC Field Facility, Tallahassee, FL 32310
    • NHMFL / FSU

  • Fedor Balakirev

    • NHMFL / LANL

  • Albert Migliori

    • National High Magnetic Field Laboratory, Pulsed Field Facility, LANL, Los Alamos, NM 87545
    • National High Magnetic Filed Laboratory-LANL, Los Alamos, NM
    • Los Alamos National Laboratory
    • 1
    • NHMFL / LANL

  • Jon Betts

    • National High Magnetic Field Laboratory, Pulsed Field Facility, LANL, Los Alamos, NM 87545
    • Los Alamos National Laboratory
    • NHMFL / LANL

  • Greg Boebinger

    • National Magnet Lab
    • NHMFL / FSU

  • Genna Logvenov

    • BNL

  • Tony Bollinger

    • BNL

  • Ivan Bozovic

    • BNL