μSR study of evolution of time-reversal symmetry in the superconducting state of dilute Nd substitution in Pr<sub>1-x</sub>Nd<sub>x</sub>Os<sub>4</sub>Sb<sub>12</sub>

POSTER

Abstract

The Pr-rich end of the alloy series Pr1−xNdxOs4Sb12 has been studied using muon spin rotation and relaxation. The end compound PrOs4Sb12 is an unconventional heavy-fermion superconductor, which exhibits a spontaneous magnetic field in the superconducting phase associated with broken time-reversal symmetry (TRS). However, with a very low concentration of Nd (x ≥ 0.05), no such spontaneous field is observed, indicating that TRS has been recovered. The superfluid density determined from the vortex-lattice field distribution is insensitive to Nd concentration for x ≤ 0.2. No Nd3+ static magnetism, ordered or disordered, is found down to the lowest temperatures of measurement.

*Research at CSU-Fresno is supported by NSF DMR-1905636; at UCSD by US DOE DE-FG02-04ER46105 and NSF DMR-1810310, at CSU-LA by NSF DMR-1523588 and HRD-1547723; at Fudan U. by National Key Research and Development Program of China 2017YFA0303104; at Hokkaido U. by JSPS KAKENHI JP21KK0046.

Presenters

  • Pei-Chun Ho

    • California State University, Fresno
    • Califor. State U, Fresno

Authors

  • Pei-Chun Ho

    • California State University, Fresno
    • Califor. State U, Fresno

  • Douglas E MacLaughlin

    • University of California, Riverside

  • M Brian Maple

    • Department of Physics, University of California, San Diego
    • University of California, San Diego
    • University of California - San Diego
    • University of California San Diego

  • Lei Shu

    • Fudan University

  • Adrian D Hillier

    • Science & Technology Facilities Council, ISIS Neutron and Muon Sources

  • Oscar O Bernal

    • California State University, Los Angeles

  • Tatsuya Yanagisawa

    • Hokkaido University
    • Hokkaido University, Japan

  • Pabitra K Biswas

    • Science & Technology Facilities Council, ISIS Neutron and Muon Sources

  • Jian Zhang

    • Fudan University

  • Cheng Tan

    • Fudan University