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3D-ΔPDF analysis of three-dimensional CDW compound (Ca<sub>x</sub>Sr<sub>1-x</sub>)<sub>3</sub>Rh<sub>4</sub>Sn<sub>13</sub>

ORAL

Abstract

A three-dimensional compound series (CaxSr1-x)3Rh4Sn13 has been identified as a promising system to understand the interplay between the charge-density-waves (CDW) and the superconductivity. The second order CDW transition temperature T* in this family can be fully suppressed with the substitution of Ca for Sr, giving rise to a Quantum Critical Point at x≈0.9 at ambient pressure. For a comprehensive understanding of the lattice instability connected to this CDW transition and superconductivity, diffuse scattering measurements were performed on a single crystal doping series in (CaxSr1-x)3Rh4Sn13 with (x=0, 0.1, 0.5, 0.6, 0.65, 0.7, 0.9) using x-ray diffraction. A 3D-ΔPDF analysis shows that there is an order-disorder transition at T*, with local distortions still present at higher temperature.

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Presenters

  • Puspa Upreti

    Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab

Authors

  • Puspa Upreti

    Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab

  • Lekhanath Poudel

    NIST Center for Neutron Research, NIST Center for Neutron Research, National Institute of Standards and Technology, Department of Materials Science and Engineering, University of Maryland, College Park

  • Matthew Krogstad

    Argonne National Laboratory, Argonne National Lab, Material Science Division, Argonne National Laboratory, Materials Science Division, Argonne National Lab, Materials Science Division, Argonne National Laboratory, Material Science, Argonne National Laboratory

  • Stephan Rosenkranz

    Materials Science Division, Argonne National Lab, Argonne National Laboratory, Argonne National Lab, Material Science Division, Argonne National Laboratory, Materials Science Division, Argonne National Laboratory, Argonne Natl Lab, Material Science, Argonne National Laboratory

  • Omar Chmaissem

    Physics, Northern Illinois University, Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab, Materials Science Division, Argonne National Lab, Northern Illinois University, Northern Illinois Univ

  • Raymond Osborn

    Argonne National Laboratory, Argonne National Lab, Material Science Division, Argonne National Laboratory, Materials Science Division, Argonne National Lab, Materials Science Division, Argonne National Laboratory, Material Science, Argonne National Laboratory