TY  - JOUR
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  - Physical review research
N2  - he 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, Ce3⁢Bi4⁢Ni3. It is an isoelectronic analog of the prototypical Kondo insulator Ce3⁢Bi4⁢Pt3 and of the recently discovered Weyl-Kondo semimetal Ce3⁢Bi4⁢Pd3. In contrast to the volume-preserving Pt-Pd substitution, structural and chemical analyses reveal a positive chemical pressure effect in Ce3⁢Bi4⁢Ni3 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 Ce3⁢Bi4⁢Pt3 and about 45 times larger than that of the Kondo-insulating background hosting the Weyl nodes in Ce3⁢Bi4⁢Pd3. We show that this gap as well as other physical properties do not evolve monotonically with increasing atomic number, i.e., in the sequence Ce3⁢Bi4⁢Ni3−Ce3⁢Bi4⁢Pd3−Ce3⁢Bi4⁢Pt3, but instead with increasing partial electronic density of states of the 𝑑 orbitals at the Fermi energy. This work opens the possibility to investigate the conditions under which topological states develop in this series of strongly correlated 3-4-3 materials.
Y1  - 2024
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/86020
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-860203
VL  - 6
IS  - 2, 023242
PB  - American Physical Society
CY  - College Park, Md
ER  -