High pressure magnetic diffraction studies on CePtSi2

ORAL

Abstract

CePtSi2 shows pressure induced superconductivity with a maximum transition temperature of 0.14 K between 1.4 and 2.1 GPa. Here we present high pressure magnetic neutron diffraction studies on CePtSi2 using polycrystalline and single-crystal samples. We determined magnetic structure at ambient pressure to be a spin-density-wave structure with magnetic propagation vector of (0.32,0,0.11) and averaged ordered moment of 0.45(5)µB. Using high pressure neutron diffraction, we investigated pressure dependence of the magnetic propagation vector and the moment. Our results provide insight on the primary role in the superconducting pairing mechanism of CePtSi2.

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Publication: S. E. Dissanayake, F. Ye, W. Tian, M. Matsuda, H. Muto, S. Suzuki, T. Nakano, S. Watanabe, J. Gouchi, and Y. Uwatoko
Phys. Rev. B 105, 245111 (2022)

Presenters

  • Sachith E Dissanayake

    University of Rochester

Authors

  • Sachith E Dissanayake

    University of Rochester

  • Feng Ye

    Oak Ridge National Laboratory

  • Wei Tian

    Oak Ridge National Laboratory

  • Masaaki Matsuda

    Oak Ridge National Lab, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, Oak Ridge National Laboratory

  • H Muto

    Niigata University

  • S. Suzuki

    Niigata University

  • T. Nakano

    Niigata University

  • Shinji Watanabe

    Kyushu Institute of Technology

  • Jun Gouchi

    University of Tokyo

  • Yoshiya Uwatoko

    University of Tokyo, Uiniversity of Tokyo