Evidence for re-entrant, zero field quantum critical point, with chemical tuning in Ce$_{1-x}$Yb$_{x}$CoIn$_{5}$

POSTER

Abstract

We performed specific heat and electronic transport studies on single crystals of Ce$_{1-x}$Yb$_{x}$CoIn$_{5}$ alloys with the motivation to probe further, some of the previously reported unusual behaviors, such as robust coherence and superconductivity, persistent non-Fermi liquid (NFL) behavior, and the possibility of quantum criticality in higher Yb doping. These measurements are performed in temperatures as low as 0.5 K and magnetic fields up to 14 T. Our analysis of specific heat and resistivity data unveils the presence of a crossover in the properties of x $=$ 0.54 doping crystals, from a high temperature NFL behavior to Fermi-liquid (FL) behavior at lower temperatures. We show that the origin of the NFL behavior is a result of quantum fluctuations. Our analysis also establishes that the alloy with x $=$ 0.54 Yb concentration is quantum critical, i.e., x$_{\mathrm{c}} = $ 0.54.

Authors

  • Y.P. Singh

    Kent State University

  • D.J. Haney

    Kent State University

  • Xinyi Huang

    Kent State University

  • Frazier Baker

    Youngstown State University, Kent State University, Liquid Crystal Institute, Kent State University, Department of Biological Sciences, Kent State University, Department of Physics, Department of Chemistry and Biochemistry, Kent State University, Stony Brook Univ, Ohio Univ, Institute for Advanced Simulation, Institut fur Kernphysik, and Julich Center, Bowling Green State University, Dept. of Physics, Hiram College, Ohio State Univ - Columbus, Kent State University, Psychology Dept, Cleveland State University, Physics Dept, Cleveland State University, Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242-0001, USA, Univ of Konstanz, Univ College London, NIST, Hiroshima Univ, KIT, Missouri University of Science and Technology, University of California, San Diego, Georgia Institute of Technology, KSU, SKKU, Lock Haven Univ, Massachusetts General Hospital, University of Science and Technology of China, Yale University, Shanghai Institute of Microsystem and Information Technology, CAS, Nanjing University, Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242, USA, Department of Physics, Kent State University, Kent OH 44242, Department of Electro-Optic Engineering Ilse Katz Institute for Nanoscale Science and Technology Ben Gurion University, Beer Sheva 84105, Israel, Ohio University Zanesville

  • Frazier Baker

    Youngstown State University, Kent State University, Liquid Crystal Institute, Kent State University, Department of Biological Sciences, Kent State University, Department of Physics, Department of Chemistry and Biochemistry, Kent State University, Stony Brook Univ, Ohio Univ, Institute for Advanced Simulation, Institut fur Kernphysik, and Julich Center, Bowling Green State University, Dept. of Physics, Hiram College, Ohio State Univ - Columbus, Kent State University, Psychology Dept, Cleveland State University, Physics Dept, Cleveland State University, Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242-0001, USA, Univ of Konstanz, Univ College London, NIST, Hiroshima Univ, KIT, Missouri University of Science and Technology, University of California, San Diego, Georgia Institute of Technology, KSU, SKKU, Lock Haven Univ, Massachusetts General Hospital, University of Science and Technology of China, Yale University, Shanghai Institute of Microsystem and Information Technology, CAS, Nanjing University, Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH 44242, USA, Department of Physics, Kent State University, Kent OH 44242, Department of Electro-Optic Engineering Ilse Katz Institute for Nanoscale Science and Technology Ben Gurion University, Beer Sheva 84105, Israel, Ohio University Zanesville

  • M. Dzero

    Kent State University

  • C.C. Almasan

    Kent State University