Quantum Criticality in Cd doped CeMIn$_{5}$.

ORAL

Abstract

In pure CeCoIn$_{5}$ the application of magnetic field has revealed a field tuned quantum critical point surprisingly coincident with the superconducting H$_{c2}$. The application of pressure suppressed the antiferromagnetic fluctuations in the system and pushed the quantum critical field inside the superconducting dome. By substituting Cd for In it was shown that one can quickly induce the antiferromagnetic state. With predominantly thermodynamic probes, such as specific heat, we investigate how the appearance of long range antiferromagnetic order induced by Cd doping influences the field tuned quantum critical behavior. This will also be contrasted with the behavior found for the antiferromagnetic quantum critical point seen in CeRhIn$_{5}$ under pressure.

*Work at LANL was performed under the auspices of US DOE. We also acknowledge NSF-DMR-0503360 for support.

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Authors

  • Filip Ronning

    • Condensed Matter and Thermal Physics, MPA, Los Alamos National Laboratory, Los Alamos, NM
    • Los Alamos National Laboratory
    • Los Alamos National Lab

  • Yoshifumi Tokiwa

    • Los Alamos National Lab
    • Los Alamos National Laboratory

  • Joe Thompson

    • Los Alamos National Laboratory
    • Condensed Matter and Thermal Physics, MPA, Los Alamos National Laboratory, Los Alamos, NM
    • Condensed Matter and Thermal Physics, Los Alamos National Laboratory, USA
    • Los Alamos National Lab.
    • MPA-CMTP, LANL
    • Los Alamos National Lab
    • Los Alamos Nat. Lab.

  • Roman Movshovich

    • Los Alamos National Lab
    • Los Alamos National Laboratory

  • Long Pham

    • Univ. of California-Davis
    • UC Davis

  • Zachary Fisk

    • Univ. of California-Irvine
    • UC Irvine