Pressure-temperature phase diagram of YbNi<sub>2</sub>B<sub>2</sub>C

ORAL

Abstract

The RNi2B2C (R = Gd - Lu, Y) series have attracted much attention due to the interplay between superconductivity and local-magnetism. For the Lu, Tm - Dy, superconducting transition temperature Tc decrease and the AFM transition temperature TN increases and scales with de Gennes scaling at ambient pressure. However, YbNi2B2C displays neither superconductivity nor magnetism down to low temperature at ambient pressure but rather is a heavy fermion compound with γ ∼ 530 mJ/mol K2. Studies suggest YbNi2B2C might be close to a quantum critical point (QCP) on the nonmagnetic side in the Doniach phase diagram. Resistance of single-crystalline YbNi2B2C is measured under pressure up to 16 GPa down to 50 mK as an attempt to reach QCP. Temperature-pressure phase diagram will be presented and discussed.

*This work is supported by DOE/BES, Materials Science and Engineering Division under contract No. DE-AC02-07CH11358. L. X. was supported, in part, by the W. M. Keck Foundation V.S. acknowledges support by DOE/BES under contract No. DE-FG02-99ER45775. A. G. acknowledges support of RSF 16-12-10464 grant.

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Presenters

  • Li Xiang

    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory/Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

Authors

  • Li Xiang

    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory/Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

  • Yuji Furukawa

    • Ames Laboratory, Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Iowa State University & Ames Lab
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Iowa State University

  • Viktor V. Struzhkin

    • Carnegie Institution of Washington, Geophysical Laboratory, Washington, DC 20015, USA
    • Geophysical Laboratory, Carnegie Institution of Washington
    • Geophysical Laboratory, Carnegie Institute of Washington

  • Alexander Gavriliuk

    • FSRC Crystallography and Photonics of Russian Academy of Sciences, Moscow 119333, Russia

  • Sergey Budko

    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

  • Paul Canfield

    • Ames Laboratory and Dept. of Physics, Iowa State University
    • Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.
    • Ames Laboratory
    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Iowa State University and Ames Laboratory
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Department of Physics & Astronomy, Iowa State University
    • Department of physics and astronomy, Iowa State University/Ames Laboratory
    • Physics, Iowa State University/Ames Laboratory
    • Ames Laboratory & Iowa State University
    • Physics, Iowa State University