Zero-field magnetism in Nd-doped CeRhIn5 under pressure

ORAL

Abstract

Unconventional superconductivity is often found in heavy fermion compounds close to a magnetic instability. Although magnetism and superconductivity may coexist when $T_{N} > T_{c}$, evidence for magnetism is usually suddenly lost when $T_{N} < T_{c}$. Here we study the heavy-fermion compound Ce$_{0.95}$Nd$_{0.05}$RhIn$_{5}$ under pressure by means of electrical resistivity and AC calorimetry measurements. Our results show that, even at zero applied magnetic field, Nd substitution unveils a hidden magnetic instability below the superconducting dome. We examine the similarities and differences between our results and those on Nd-doped CeCoIn$_{5}$ as well as pure CeRhIn$_{5}$ under applied field and pressure. We discuss our results in light of recent calculations that include $d$-wave superconductivity and underlying magnetic correlations.

*Work at Los Alamos was performed under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering. P. F. S. Rosa acknowledges a Director’s Postdoctoral Fellowship through the LDRD program.

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Authors

  • Priscila Rosa

    • Los Alamos National Laboratory

  • Aaron Oostra

    • University of California at Irvine

  • Yongkang Luo

    • Los Alamos National Laboratory

  • Nicholas Wakeham

    • Los Alamos National Laboratory

  • Filip Ronning

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • Los Alamos National Lab

  • Eric Bauer

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory

  • Zachary Fisk

    • University of California Irvine
    • University of California at Irvine

  • Joe Thompson

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory