Fermi-surface topology of the heavy-fermion system Ce${}_2$PtIn${}_8$

Abstract

Ce${}_2$PtIn${}_8$ is a recently discovered heavy-fermion system structurally related to the well-studied superconductor CeCoIn${}_5$. Here, we report on low-temperature de Haas-van Alphen-effect measurements in high magnetic fields in Ce${}_2$PtIn${}_8$ and Pr${}_2$PtIn${}_8$. In addition, we performed band-structure calculations for localized and itinerant Ce-$4f$ electrons in Ce${}_2$PtIn${}_8$. Comparison with the experimental data of Ce${}_2$PtIn${}_8$ and of the $4f$-localized Pr${}_2$PtIn${}_8$ suggests the itinerant character of the Ce-$4f$ electrons. This conclusion is further supported by the observation of effective masses in Ce${}_2$PtIn${}_8$, which are strongly enhanced with up to 26 bare electron masses.

10 pages, 12 figures

References in corpus (5)

• Heavy-fermion superconductivity in Ce2PdIn8
• Single crystal study of the layered heavy fermion compounds Ce${}_2$PdIn${}_8$, Ce${}_3$PdIn${}_{11}$, Ce${}_2$PtIn${}_8$ and Ce${}_3$PtIn${}_{11}$
• Quantum criticality in Ce2PdIn8: thermoelectric study
• Nodal superconductivity and non-Fermi-liquid behavior in Ce2PdIn8 studied by 115In nuclear quadrupole resonance
• Quasi-two-dimensional Fermi surfaces with localized $f$ electrons in the layered heavy-fermion compound CePt${}_2$In${}_7$