Localized f-electron magnetism in the semimetal Ce3Bi4Au3

Abstract

Ce${}_3$Bi${}_4$Au${}_3$ crystallizes in the same non-centrosymmetric cubic structure as the prototypical Kondo insulator Ce${}_3$Bi${}_4$Pt${}_3$. Here we report the physical properties of Ce${}_3$Bi${}_4$Au${}_3$ single crystals using magnetization, thermodynamic, and electrical-transport measurements. Magnetic-susceptibility and heat-capacity data reveal antiferromagnetic (AFM) order below $T_N=3.2$ K. The magnetic entropy $S_{\mathrm{mag}}$ reaches $R$ln2 slightly above $T_N$, which suggests localized $4f$-moments in a doublet ground state. Multiple field-induced magnetic transitions are observed at temperatures below $T_N$, which indicate a complex spin structure with competing interactions. Ce${}_3$Bi${}_4$Au${}_3$ shows semimetallic behavior in electrical resistivity measurements in contrast to the majority of reported Cerium-based 343 compounds. Electrical-resistivity measurements under hydrostatic pressure reveal a slight enhancement of $T_N$ under pressures up to 2.3 GPa, which supports a scenario wherein Ce${}_3$Bi${}_4$Au${}_3$ belongs to the far left of the Doniach phase diagram dominated by Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions. Using realistic many-body simulations, we confirm the semi-metallic electronic structure of Ce${}_3$Bi${}_4$Au${}_3$ and quantitatively reproduce its local moment behavior in the paramagnetic state.

arXiv comment10 pages, 10 figures

References in corpus (17)

• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Metal-Insulator-Like Behavior in Semimetallic Bismuth and Graphite
• Weyl-Kondo Semimetal in Heavy Fermion Systems
• Large Seebeck Effect by Charge-Mobility Engineering
• Giant spontaneous Hall effect in a nonmagnetic Weyl-Kondo semimetal
• Signatures of electronic correlations in iron silicide
• Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
• Thermoelectricity in correlated narrow-gap semiconductors
• High thermoelectric performance in metallic NiAu alloys
• Low Temperature metamagnetism and Hall effect anomaly in Kondo compound CeAgBi2
• From Trivial Kondo Insulator Ce${}_3$Pt${}_3$Bi${}_4$ to Topological Nodal-line Semimetal Ce${}_3$Pd${}_3$Bi${}_4$
• Magnetic field-tuned quantum criticality in a Kondo insulator
• Resistivity saturation in Kondo insulators
• Isoelectronic tuning of heavy fermion systems: Proposal to synthesize Ce3Sb4Pd3
• Superconductivity in the nodal-line compound La${}_3$Pt${}_3$Bi${}_4$
• Ground state of Ce${}_3$Bi${}_4$Pd${}_3$ unraveled by hydrostatic pressure
• Crystal field effects and quadrupole fluctuations in Ce${}_3$Au${}_3$Sb${}_4$ detected by Sb NQR

Cited by in corpus (1)

• Magnetization plateau and anisotropic magnetoresistance in the frustrated Kondo-lattice compound Ce3ScBi5