Effect of pressure on hole-doped CeCoIn$_{5}$ and CeRhIn$_{5}$.

ORAL

Abstract

With one less p-electron than In, Cd or Hg adds one hole per substituted In in CeMIn$_{5}$ (M=Co,Rh, Ir). Progressive Cd/Hg substitutions tune the ground state of superconducting CeCoIn$_{5}$ to one of coexisting magnetism and superconductivity and eventually to antiferromagnetic only. This systematic evolution of states in doped CeCoIn$_{5}$ is reversed accurately by applied pressure and maps onto the temperature-pressure phase diagram of pure CeRhIn$_{5}$. These observations, together with the response of Cd-substituted CeRhIn$_{5}$ to applied pressure, show that ground states of CeMIn$_{5}$ are controlled by fine details of electronic structure and that disorder on the In site and different ionic radii of Cd and Hg have an insignificant effect.

*ZF, LDP and SM acknowledge support by NSF-DMR-0503360. Work at Los Alamos was performed under the auspices of the US DOE, Office of Science.

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Authors

  • S. Maquilon

    • U. C. Davis

  • Z. Fisk

    • U. C. Irvine

  • V. A. Sidorov

    • Los Alamos National Lab

  • Tuson Park

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

  • 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.

  • L. D. Pham

    • U. C. Davis