Inverted structures of common crystal lattices, referred to as antistructures, are rare in nature due to their thermodynamic constraints imposed by the switched cation and anion positions in reference to the original structure. However, a stable antistructure formed with mixed bonding characters of constituent elements in unusual valence states can provide unexpected material properties. Here, a heavy-fermion behavior of ferromagnetic gadolinium lattice in Gd SnC antiperovskite is reported, contradicting the common belief that ferromagnetic gadolinium cannot be a heavy-fermion system due to the deep energy level of localized 4f-electrons. The specific heat shows an unusually large Sommerfeld coefficient of ≈1114 mJ mol K with a logarithmic behavior of non-Fermi-liquid state. It is demonstrated that the heavy-fermion behavior in the non-Fermi-liquid state appears to arise from the hybridized electronic states of gadolinium 5d-electrons participating in metallic GdGd and covalent GdC bonds. These results accentuate the unusual chemical bonds in CGd octahedra with the dual characters of gadolinium 5d-electrons for the emergence of heavy fermions.

Download full-text PDF

Source
http://dx.doi.org/10.1002/adma.202102958DOI Listing

Publication Analysis

Top Keywords

heavy fermions
8
heavy-fermion behavior
8
ferromagnetic gadolinium
8
behavior non-fermi-liquid
8
non-fermi-liquid state
8
gadolinium 5d-electrons
8
antiperovskite snc
4
snc unusual
4
unusual coexistence
4
coexistence ferromagnetism
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!