ausblenden:
Schlagwörter:
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Zusammenfassung:
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.