Low-carrier Density and Fragile Magnetism in a Kondo Lattice System

ORAL

Abstract

Known low-carrier Kondo systems evolve from metallic non-magnetic analogues, while a recent theoretical model for the dilute carrier Kondo limit predicts semimetallic behavior. Very few 4f low-carrier Kondo systems have been reported, mostly based on Ce. In this talk, I will show evidence for low-carrier Kondo behavior in Yb3Ir4Ge13 with a low carrier background as illustrated by the non-magnetic analogue Lu3Ir4Ge13. A fragile magnetic state occurs in the Yb compound at very low temperatures, which, together with the semimetalic behavior, can be understood within the framework of the dilute-carrier limit of a Kondo lattice model. An entirely new regime of the Kondo effect is discovered, where the fragile magnetism can also be tuned in a non-Fermi liquid fashion through Lu-for-Yb substitution.

–

Presenters

  • Emilia Morosan

    Physics and Astronomy, Rice University, Rice University, Physics & Astronomy, Rice University

Authors

  • Binod Rai

    Physics and Astronomy, Rice University

  • Iain Oswald

    Chemistry, University of Texas at Dallas

  • Wenjing Ban

    Physics, Peking University

  • Chien-Lung Huang

    Physics and Astronomy, Rice University, Rice University

  • Vaideesh Loganathan

    Physics and Astronomy, Rice University, Rice University

  • Alannah Hallas

    Physics and Astronomy, Rice University, McMaster Univ, Rice University

  • Murray Wilson

    McMaster University, Physics and Astronomy, McMaster University, Department of Physics and Astronomy, McMaster Univ, Physics and Atmospheric Science, Dalhousie University

  • Graeme Luke

    McMaster University, Physics and Astronomy, McMaster University, Department of Physics and Astronomy, McMaster Univ, Department of Physics and Astronomy, McMaster University, Physics and Astronomy, McMaster Univ, MacMaster University, Physics, McMaster University, McMaster Univ

  • Leland Harriger

    NIST Center for Neutron Research, NCNR, NIST, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, NIST center for Neutron Scattering

  • Qingzhen Huang

    NIST Center for Neutron Research

  • Yu Li

    Physics and Astronomy, Rice University, Rice University

  • Sami Dzsaber

    Physics, Institute of Solid State Physics, Vienna University of Technology

  • Julia Chan

    Chemistry, University of Texas at Dallas

  • Nan Lin Wang

    Physics, Peking University

  • Silke Buehler-Paschen

    Physics, Institute of Solid State Physics, Vienna University of Technology, Vienna University of Technology, Institute of Solid State Physics, Vienna University of Technology

  • Jeffrey Lynn

    NIST Center for Neutron Research, NIST center for Neutron Research, NIST Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, NIST, NCNR, NIST -Natl Inst of Stds & Tech

  • Andriy Nevidomskyy

    Department of Physics and Astronomy, Rice University, Physics and Astronomy, Rice University, Department of Physics and Astronomy, Rice Univ, Rice University

  • Pengcheng Dai

    Physics and Astronomy, Rice University, Rice University, Physics, Rice University, Rice Univeristy

  • Qimiao Si

    Department of Physics and Astronomy, Rice University, Physics and Astronomy, Rice Univ, Physics and Astronomy, Rice University, Rice Univ, Rice Universiry, Physics, Rice University, Rice University, Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Physics and Astronomy, and Rice Center for Quantum Materials, Rice University, Department of Physics and Astronomy, Rice Univ

  • Emilia Morosan

    Physics and Astronomy, Rice University, Rice University, Physics & Astronomy, Rice University