Evidence for a hybridization gap in noncentrosymmetric CeRuSi3

Article

关键词: HEAVY-FERMION COMPOUNDS;    KONDO-LATTICE;    ANTIFERROMAGNETISM;    BEHAVIOR;    PHASES;   

DOI  :  10.1103/PhysRevB.91.064419

来源: SCIE

【 摘 要 】

Inelastic neutron scattering (INS) and specific heat measurements have been performed on the intermediate valence compound CeRuSi3, which is isostructural to the noncentrosymmetric pressure-induced superconductors CeRhSi3, CeIrSi3, and CeCoGe3. INS measurements at 7 K reveal a broad peak at (58.5 +/- 1.4) meV, while at 300 K, broad quasielastic scattering is observed. This indicates a large Kondo temperature of T-K similar to 680 K. The magnetic contribution to the specific heat (C-mag) has a value of gamma = 62.5(1) mJ/mol K-2 at low temperatures and above about 100 K can be well accounted for by the Coqblin-Schrieffer model with a characteristic temperature of T-0 = 680 K, which is further evidence that CeRuSi3 is in the intermediate valence regime.

【 授权许可】

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