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Journal Article

Fermi-surface topology of the iron pnictide LaFe2P2


Rosner,  H.
Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Blackburn, S., Prévost, B., Bartkowiak, M., Ignatchik, O., Polyakov, A., Förster, T., et al. (2014). Fermi-surface topology of the iron pnictide LaFe2P2. Physical Review B, 89(22): 220505, pp. 1-5. doi:10.1103/PhysRevB.89.220505.

Cite as: http://hdl.handle.net/11858/00-001M-0000-001A-19E4-5
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.