Tilted Weyl-Kondo Semimetal in Heavy Fermion Systems*

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).