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Valence Transition in CeOs<sub>4</sub>Sb<sub>12 </sub>and Its <i>T</i>-<i>H</i> Phase Diagram

POSTER

Abstract

The filled skutterudite compound CeOs4Sb12 displays Kondo insulating behavior accompanied by a ~1 K Spin-Density-Wave order state. Recently it has also been suggested as a potential topological insulator. In penetration depth and magnetic susceptibility measurements, we found a Fermi-surface reconstruction in CeOs4Sb12 and an unusual phase boundary in the temperature T vs magnetic field H diagram associated with the valence transition from the Ce4+ to Ce3+ state, denoted as an L and an H phase, respectively. Based on the experimental features from magnetostriction, magnetoresistance, and high T skin depth, a newly modified T-H phase boundary of the L to H phases becoming much broader than what originally thought.1,2 The cyclotron mass of the conduction electron has a significant enhancement below ~35 T.
1 arXiv:1907.09181 2 PRB 94, 205140 (2016).

Presenters

  • Pei-Chun Ho

    Physics, California State University, Fresno, Department of Physics, California State University, Fresno

Authors

  • Pei-Chun Ho

    Physics, California State University, Fresno, Department of Physics, California State University, Fresno

  • John Singleton

    NHMFL, LANL

  • Marcelo Jaime

    Los Alamos Natl Lab, Los Alamos National Laboratory, NHMFL, LANL

  • Kathrin Goetze

    HLD (HZDR) / TU Dresden, Physics, Warwick University, Physics, University of Warwick, University of Warwick, Department of Physics, University of Warwick, Physics Department, University of Warwick, Coventry, CV4 7AL, United Kingdom

  • Matthew Pearce

    Physics, Warwick University, Physics, University of Warwick, University of Warwick, Department of Physics, University of Warwick, Physics Department, University of Warwick, Coventry, CV4 7AL, United Kingdom

  • Paul Goddard

    Physics, Warwick University, Department of Physics, University of Warwick, Univ of Warwick, Physics, University of Warwick, University of Warwick

  • Kalyan Sasmal

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

  • M Brian Maple

    Department of Physics, University of California, San Diego, UCSD, University of California, San Diego, physics, University of Califormia, San Diego, Departement of Physics, University fo California, San Diego, Physics, University of California, San Diego

  • Tatsuya Yanagisawa

    Physics, Hokkaido University, Department of Physics, Hokkaido University