Upper critical field in electron-doped Pr$_{2-x}$Ce$_{x}$CuO$_{4-\delta }$ in parallel magnetic fields

ORAL

Abstract

We report a comprehensive study of the resistive superconducting transition in the electron-doped Pr$_{2-x}$Ce$_{x}$CuO$_{4-\delta }$ films down to 1.5K for magnetic field up to 58T applied parallel to the conducting ab-planes. We find that the parallel critical field (H$_{c2//ab})$ exceeds 58T for underdoped and optimally doped films. For the overdoped films, 58T is sufficient to suppress the superconductivity. An H$_{c2//ab}$ -T phase diagram is established. A comparison between our experimental results and theories for orbital and spin pairbreaking effects will be presented.

*This work was supported by NSF Grant DMR-0352735. The work at NHMFL was supported by the NSF and DOE.

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Authors

  • Pengcheng Li

    • Center for Superconductivity Research and Department of Physics, University of Maryland, College Park, MD 20742

  • F.F. Balakirev

    • NHMFL-LANL, Los Alamos, NM 87545

  • R.L. Greene

    • Center for Superconductivity Research and Department of Physics, University of Maryland, College Park, MD 20742