Electronic, magnetic, and electric transport properties of Ce3Rh4Sn13and Ce

A. Ślebarski

¹

,

B. D. White

²

,

Marcin Fijałkowski

³

et al.

Abstract

We present an investigation of the magnetic, thermodynamic, and electric transport properties, and the electronic structure of the strongly correlated compounds Ce3Rh4Sn13 and Ce3Co4Sn13. The main goal of this report is to compare the physical properties of both compounds and to explain the abnormal electrical resistivity behavior in Ce3Co4Sn13 above ∼ 160 K, which has not been observed in Ce3Rh4Sn13. We suggest that a possible local distortion of the trigonal Sn2 prisms around Co occurs in Ce3Co4Sn13 below ∼ 160 K, which could change the electronic structure near the Fermi level, and as a consequence, explain the metallic behavior visible in the resistivity above this temperature. We determined experimentally the hybridization energy ∆ between the f -electron and conduction-electron states for both compounds and its influence on the different ρ(T ) behaviors under pressure. The complimentary experimental data allowed us to explain the semimetallic properties of both compounds and the transition between semimetallic and metallic behavior in Ce3Co4Sn13, which is not observed for Ce3Rh4Sn13.

Partially gapped Fermi surfaces in La3Co4Sn13revealed by nuclear magnetic resonance

“…Such an interpretation has been confirmed by the temperature-dependent XRD measurements on the isostructural compounds of Sr 3 Ir 4 Sn 13 and Ce 3 Co 4 Sn 13 . 14,36 This would give rise to a possible nesting of Fermi surfaces, and thus facilitate the CDW formation. As a matter of fact, partially gapping of the Fermi surfaces with a factor of 7.7% reduction in N d (E F ) has been revealed from our NMR T 1 analysis.…”

Effect of atomic disorder and Ce doping on superconductivity ofCa3Rh4Sn13: Electric transport properties under high pressure

“…Measurements of ρ under pressure were performed in a beryllium-copper, piston-cylinder clamped cell (for details, see Ref. 19).…”

Crystal electric field and the ground state properties of heavy fermion Ce 3 Ru 4 Sn 13

“…Recently [6,8], we reported that the distances Sn1(Sn2) 12 are evidently temperature dependent, which suggests that the low-T structure is locally distorted with respect to the structure at the room temperature. A subtle structural transition from the simple cubic structure at room temperature to a superlattice variant observed below $ 160 K leads to the anomaly in the temperature dependencies of lattice parameters, specific heat, magnetic susceptibility, and resistivity of several Ce 3 M 4 Sn 13 compounds [8,7], while the density functional (DFT) calculations showed high charge density accumulation between metal M and Sn2 atoms, which implies a strong covalent bonding interaction [19,22].…”

“…The system R 3 M 4 X 13 has also generated much interest due to their physical properties, such as subtle structural transition from a simple cubic phase to the superlattice variant with accompanying distinct anomalies in the electrical resistivity [4], magnetic susceptibility and specific heat [5][6][7][8][9], quantum criticality [10,11], superconductivity [12][13][14], and the coexistence of magnetism and superconductivity [15]. A quasi-skutterudite superconducting Ca 3 Ir 4 Sn 13 is a good example of the electron correlated system with the superlattice quantum critical point (QCP) reported under chemical or physical pressure [11].…”