PuPt2In7: A computational and experimental investigation

Article

关键词: HEAVY-FERMION SUPERCONDUCTIVITY;    ELECTRONIC-STRUCTURE;    DELTA-PU;    MAGNETISM;    SPECTRA;    PUCOGA5;    CECOIN5;   

DOI  :  10.1103/PhysRevB.86.115137

来源: SCIE

【 摘 要 】

Flux-grown single crystals of PuPt2In7 are characterized and found to be both nonsuperconducting and nonmagnetic down to 2 K. The Sommerfeld specific heat coefficient of 250 mJ/mol K-2 indicates heavy fermion behavior. We report the results of generalized gradient approximation (GGA)+U calculations of PuPt2In7 and as yet unsynthesized isovalent PuPt2Ga7. The strength of the c-f hybridization of PuPt2In7 is similar to the PuCoIn5 superconductor. The bare and f-weighted susceptibility within the constant-matrix-element approximation is calculated, showing a maximum along the q(z) direction at q(x) = q(y) = 0.5. A similar and slightly stronger maximum is also found in the structurally related heavy-fermion materials PuCoGa5 and PuCoIn5. The absence of superconductivity in PuPt2In7 is examined based on the results of our calculations.

【 授权许可】

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