Weyl-Kondo semimetal and proximate phases in heavy fermion systems

ORAL

Abstract

Recently we have introduced a periodic Anderson model on a noncentrosymmetric lattice and demonstrated a Weyl-Kondo semimetal (WKSM) [1], a strongly correlated topological semimetal phase. It features Weyl nodes developing out of the Kondo effect, with strongly reduced effective electron velocity, corresponding to a narrow band. Our proposed key experimental signatures have been realized in the recently discovered noncentrosymmetric heavy fermion semimetal Ce3Bi4Pd3 [2]. In this work, we address the role of space group symmetry on the WKSM phase, and study the overall phase diagram by analyzing transitions from WKSM to nearby phases. Furthermore, amid the rapidly expanding experimental results, we explore the thermodynamic signatures of these phases.

[1] H.-H. Lai, S. E. Grefe, S. Paschen, Q. Si, arXiv:1612.03899, (2016).
[2] S. Dzsaber L. Prochaska, A. Sidorenko, G. Eguchi, R. Svagera, M. Waas, A. Prokofiev, Q. Si, and S. Paschen, Phys. Rev. Lett. 118, 246601 (2017).

*NSF Grant No. DMR-1611392, ARO Grant No. W911NF-14-1-0525, & Robert A. Welch Foundation Grant No. C-1411.

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Presenters

  • Sarah Grefe

    • Physics and Astronomy, and Rice Center for Quantum Materials, Rice University

Authors

  • Sarah Grefe

    • Physics and Astronomy, and Rice Center for Quantum Materials, Rice University

  • Hsin-Hua Lai

    • Department of Physics and Astronomy, Rice University
    • Rice Univ
    • Physics and Astronomy, and Rice Center for Quantum Materials, Rice University
    • Department of Physics and Astronomy, Rice Univ

  • Silke Buehler-Paschen

    • Physics, Institute of Solid State Physics, Vienna University of Technology
    • Vienna University of Technology
    • Institute of Solid State Physics, Vienna University of Technology

  • Qimiao Si

    • Department of Physics and Astronomy, Rice University
    • Physics and Astronomy, Rice Univ
    • Physics and Astronomy, Rice University
    • Rice Univ
    • Rice Universiry
    • Physics, Rice University
    • Rice University
    • Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University
    • Physics and Astronomy, and Rice Center for Quantum Materials, Rice University
    • Department of Physics and Astronomy, Rice Univ