Fermi-surface topology of the iron pnictide LaFe2P2

Article

关键词: SUPERCONDUCTIVITY;    PHOSPHIDES;    MAGNETISM;   

DOI  :  10.1103/PhysRevB.89.220505

来源: SCIE

【 摘 要 】

We report on a comprehensive de Haas-van Alphen (dHvA) study of the iron pnictide LaFe2P2. Our extensive density-functional band-structure calculations can well explain the measured angular-dependent dHvA frequencies. As salient feature, we observe only one quasi-two-dimensional Fermi-surface sheet; i.e., a hole-like Fermi-surface cylinder around Gamma, essential for s(+/-) pairing, is missing. In spite of considerable mass enhancements due to many-body effects, LaFe2P2 shows no superconductivity. This is likely caused by the absence of any nesting between electron and hole bands.

【 授权许可】

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