HIGH FIELD MAGNETORESISTANCE NEAR OPTIMAL DOPING IN La$_{\mathrm{2-x}}$Sr$_{\mathrm{x}}$CuO$_{\mathrm{4}}$

ORAL

Abstract

An outstanding experimental feature of the metallic behavior of all high-temperature superconductors near optimal doping is the linear-in-temperature resistivity observed over a wide temperature range. Although metallic quantum criticality in these systems has been proposed to be the origin of this anomalous temperature dependence, its manifestation in the magnetotransport, yet to be determined, can become a source of important insight into the physics of these compounds. The experimental challenge is to measure normal state magnetoresistance in a broad range of magnetic fields, always limited by the H$_{\mathrm{c2}}$ on the lower side and the available magnetic fields on the higher. Here we report magnetoresistance measurements in thin films of La$_{\mathrm{2-x}}$Sr$_{\mathrm{x}}$CuO$_{\mathrm{4}}$, for magnetic fields beyond 65T - well above the highest fields used in previous studies of this system. We discuss the signature for quantum criticality based upon the high-field magnetoresistance measurements over a broad temperature range.

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Authors

  • Jose A. Galvis

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA, NHMFL

  • Paula Giraldo-Gallo

    Stanford University and National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA

  • Scott C. Riggs

    NHMFL-FSU, National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA, NHMFL

  • Zachary Stegen

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA

  • Brad Ramshaw

    National High Magnetic Field Laboratory, Los Alamos National Laboratory,, National High MagneticField Laboratory, Los Alamos National Laboratory, Los Alamos, NM, USA.

  • Kimberly Modic

    National High MagneticField Laboratory, Los Alamos National Laboratory, Los Alamos, NM, USA.

  • Ross McDonald

    Los Alamos National Laboratory, Los Alamos, NM 87545, USA, LANL, Los Alamos National Laboratory, National High MagneticField Laboratory, Los Alamos National Laboratory, Los Alamos, NM, USA.

  • I. Bozovic

    Brookhaven National Laboratory, Upton, NY 11973, USA., Brookhaven National Laboratory

  • Arkady Shekhter

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA, NHMFL

  • Greg S. Boebinger

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA, FSU/NHMFL