Tilted Weyl-Kondo Semimetal in Heavy Fermion Systems

ORAL

Abstract

Recently we have introduced a time-reversal-symmetry (TRS) invariant periodic Anderson model on a noncentrosymmetric and nonsymmorphic lattice and demonstrated a Weyl-Kondo semimetal (WKSM) [1]. This strongly correlated, Kondo driven, topological semimetal phase has been evidenced in the recently discovered heavy fermion semimetal Ce3Bi4Pd3 [2]. In condensed matter systems without Lorentz invariance, a term that tilts the Weyl nodes is naturally present. In this study, we generalize the periodic Anderson model to realize a Tilted Weyl-Kondo Semimetal (TWKSM). We show how the tilted Weyl nodes allow for measurable properties that probe the topological nature of the TWKSM.
[1] H.-H. Lai, S. E. Grefe, S. Paschen, Q. Si, PNAS 115, 93-97 (2018).
[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, the ARO Grant No. W911NF-14-1-0525, the Robert A. Welch Foundation Grant No. C-1411, and a Smalley Postdoctoral Fellowship at the Rice Center for Quantum Materials

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Presenters

  • Sarah Grefe

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

Authors

  • Sarah Grefe

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

  • Hsin-Hua Lai

    • Rice University
    • Department of Physics and Astronomy, Rice University

  • Silke Paschen

    • Vienna University of Technology

  • Qimiao Si

    • Rice University
    • Department of Physics and Astronomy, Rice University
    • Department of Physics and Astronomy, Houston, Texas 77005, USA, Rice University