Evolution of superconductivity and magnetic order in LaRu$_3$Si$_2$ by rare earth and transition metal substitutions.

ORAL

Abstract

The recent discovery of high temperature superconductivity in iron based materials has renewed interest to condensed matter physics. Although its mechanism is not yet settled completely, it should have a close relationship with the electron correlations. The compound LaRu$_{3}$Si$_{2}$ shows superconductivity with a transition temperature $T_{\mathrm{c}}=$ 7.8 K. Recent study indicates that electron correlations play a significant role for superconductivity in this Kagome lattice of Ru and the Ru band dominates at the Fermi level, similar to Fe-band in iron-superconductors. Superconductivity in LaRu$_{3}$Si$_{2}$ has been found robust against the local paramagnetic moment. We will present our study on the evolution of superconductivity and magnetic order in LaRu$_{3}$Si$_{2}$ due to substitutions of Tm, a J$=$6 (J is the total angular momentum) ion with a maximum ordered moment of 7 $\mu_{\mathrm{B}}$, and transition metals by measuring magnetic, transport and Neutron scattering properties.

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Authors

  • Renxiong Wang

    Ceter for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742

  • Shanta R. Saha

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland-College Park, Ceter for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742

  • Johnpierre Paglione

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland-College Park, Ceter for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, University of Maryland, Department of Physics, University of Maryland, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, Center for Nanophysics and Advanced Materials, Dept. of Physics, University of Maryland, College Park

  • Daniel Pratt

    NIST Center for Neutron Research, Gaithersburg, MD 20899, NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

  • Qingzhen Huang

    NIST Center for Neutron Research, Gaithersburg, MD 20899

  • Jeff Lynn

    NIST Center for Neutron Research, Gaithersburg, MD 20899, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899