Low temperature specific heat study on Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$

ORAL

Abstract

By annealing the electron-doped Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$ (PLCCO) in vacuum at different temperatures, we have successfully obtained several superconducting PLCCO samples with different T$_{c}$. The specific heat of all the samples show a 1/T$^2$ behavior below 1K. Above 1K, the low field specific heat can be fitted by $\gamma(H) T + \beta T^3$, where the $\gamma(H)$ is the Sommerfeld coefficient. We present magnetic field dependent data of $\gamma(H)$ for several samples of PLCCO and discuss the evolution of $\gamma(H)$ as PLCCO is tuned from an antiferromagnetically ordered insulator to a Tc=25 K superconductor.

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Authors

  • Shiliang Li

    • University of Tennessee

  • Songxue Chi

    • University of Tennessee, Knoxville
    • Univ. of Tennessee

  • Pengcheng Dai

    • Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
    • The University of Tennessee / ORNL
    • Univ. of Tenn. and ORNL
    • University of Tennessee/Oak Ridge National Laboratory

  • Haihu Wen

    • National Laboratory for Superconductivity, Institute of Physics \& Center for Condensed Matter Physics, Beijing 100080, China