TY  - INPR
A1  - Kirschbaum, Diana M.
A1  - Yan, Xinlin
A1  - Waas, Monika
A1  - Svagera, Robert
A1  - Prokofiev, Andrey
A1  - Stöger, Berthold
A1  - Giester, Gerald
A1  - Rogl, Peter
A1  - Oprea, Diana-Gabriela
A1  - Felser, Claudia
A1  - Valentí, Roser
A1  - Vergniory, Maia G.
A1  - Custers, Jeroen
A1  - Paschen, Silke
A1  - Zocco, Diego Andres
T1  - Ce₃Bi₄Ni₃ − a large hybridization-gap variant of Ce₃Bi₄Pt₃
T2  - arXiv
N2  - The family of cubic noncentrosymmetric 3-4-3 compounds has become a fertile ground for the discovery of novel correlated metallic and insulating phases. Here, we report the synthesis of a new heavy fermion compound, Ce3Bi4Ni3. It is an isoelectronic analog of the prototypical Kondo insulator Ce3Bi4Pt3 and of the recently discovered Weyl-Kondo semimetal Ce3Bi4Pd3. In contrast to the volume-preserving Pt-Pd substitution, structural and chemical analyses reveal a positive chemical pressure effect in Ce3Bi4Ni3 relative to its heavier counterparts. Based on the results of electrical resistivity, Hall effect, magnetic susceptibility, and specific heat measurements, we identify an energy gap of 65-70 meV, about eight times larger than that in Ce3Bi4Pt3 and about 45 times larger than that of the Kondo-insulating background hosting the Weyl nodes in Ce3Bi4Pd3. We show that this gap as well as other physical properties do not evolve monotonically with increasing atomic number, i.e., in the sequence Ce3Bi4Ni3-Ce3Bi4Pd3-Ce3Bi4Pt3, but instead with increasing partial electronic density of states of the d orbitals at the Fermi energy. To understand under which condition topological states form in these materials is a topic for future studies.
Y1  - 2024
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/86023
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-860232
UR  - https://arxiv.org/abs/2311.17903v2
IS  - 2311.17903v2
PB  - arXiv
ER  -