Structural and physical properties of new Ce-based silicides CeMAl4Si2 (M$ = $ Rh, Ir, Pt) and germanides

ORAL

Abstract

There is a great deal of interest in the Ce-based intermetallic compounds because of the wide variety of strongly correlated electron behavior they exhibit including heavy Fermion behavior, quantum criticality, unconventional superconductivity and complex magnetic order. Recently we have synthesized new Ce-based tetragonal layered silicides - CeMAl$_{4}$Si$_{2}$ (M$=$Rh, Ir, Pt) that show anisotropic behavior in magnetic susceptibility and electrical resistivity. Furthermore, electronic structure calculations reveal a quasi 2D-character of the Fermi surface. We will discuss the importance of these observations and relevance of these and the related compounds in search of new heavy fermion superconductors.~ We will also present the structural and physical properties of the related Ce-based tetragonal/hexagonal germanides.

*Work at Los Alamos was performed under the auspices of US DOE.

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Authors

  • Nirmal Ghimire

    • Los Alamos Natl Lab

  • Filip Ronning

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory
    • LANL
    • Los Alamos National Laboratory, Materials Physics and Applications Division, Los Alamos, New Mexico 87545, USA

  • Darrick Williams

    • Los Alamos Natl Lab

  • Brian Scott

    • Los Alamos Natl Lab

  • Yongkang Luo

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

  • Samantha Cary

    • Florida State University
    • Dept. Chem. and Biochem., Florida State Univ.

  • Thomas Albrecht-Schmitt

    • Florida State University
    • Dept. Chem. and Biochem., Florida State Univ.

  • Joe Thompson

    • LANL
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

  • Eric Bauer

    • Los Alamos National Laboratory
    • LANL
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
    • National High Magnetic Field Laboratory