Simple transport models for the temperature-dependent linear magnetoresistance of pnictide and cuprate superconductors

ORAL

Abstract

Taken in conjunction with the temperature (T) dependence of the zero-field resistivity, simple transport models invoking e.g., realistic variations in charge-carrier density are shown to be sufficient to explain the linear magnetoresistance and field-temperature resistance scaling recently observed in high-temperature pnictide and cuprate superconductors. Hence, though the T-linear zero-field resistance is a definite signature of the "strange metal" state of high-temperature superconductors, their linear magnetoresistance and its scaling need not be; instead they may merely be signatures of disorder. Straightforward experimental tests of these assertions are proposed.

*Supported by the US DoE BES FWP Science in 100 T, and carried out at NHMFL, which is funded by NSF Cooperative Agreement DMR-1157490, the State of Florida and U.S. DoE.

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Presenters

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • MPA-MAG, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545
    • Los Alamos National Laboratory
    • NHMFL, Los Alamos National Labs
    • NHMFL, Los Alamos National Laboratory
    • Los Alamos, National High Magnetic Field Laboratory
    • NHMFL, Los Alamos Natl Lab
    • Los Alamos Natl Lab

Authors

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • MPA-MAG, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545
    • Los Alamos National Laboratory
    • NHMFL, Los Alamos National Labs
    • NHMFL, Los Alamos National Laboratory
    • Los Alamos, National High Magnetic Field Laboratory
    • NHMFL, Los Alamos Natl Lab
    • Los Alamos Natl Lab