Topological Semimetals in Heavy Fermion Compounds

Gapless electronic topology driven by strong correlations is an emerging field of great interest, with heavy fermion compounds at its forefront. I will introduce the first such materials class, Weyl-Kondo semimetals [1-3], and report on the giant signatures of topology observed in Ce₃Bi₄Pd₃ [1,3] and the genuine topology control that can be achieved by magnetic field tuning [4,5]. I will also discuss design strategies for further correlation-driven topological phases, and discuss several realizations [6,7].<br/>This work was supported by the Austrian Science Fund (FWF-I4047, I5868-FOR5249-QUAST, SFB F 86, Q-M&S), the European Union’s Horizon 2020 Research and Innovation Programme (824109, EMP), and the European Research Council (ERC Advanced Grant 101055088, CorMeTop).<br/><br/>[1] S. Dzsaber et al., Phys. Rev. Lett. 118, 246601 (2017).<br/>[2] H.-H. Lai et al., PNAS 115/1, 93 (2018).<br/>[3] S. Dzsaber et al., PNAS 118, e2013386118 (2021).<br/>[4] S. Dzsaber et al., Nat. Commun. 13, 5729 (2022).<br/>[5] S. E. Grefe et al., arXiv:2012.15841.<br/>[6] L. Chen et al., Nat. Phys. 18, 1341 (2022).<br/>[7] H. Hu et al., arXiv:2110.06182.<br/>[8] D. M. Kirschbaum et al., in preparation (2023).