Fermi-surface topology of the iron pnictide LaFe${}_2$P${}_2$

Abstract

We report on a comprehensive de Haas--van Alphen (dHvA) study of the iron pnictide LaFe${}_2$P${}_2$. 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 $s_{\pm }$ pairing, is missing. In spite of considerable mass enhancements due to many-body effects, LaFe${}_2$P${}_2$ shows no superconductivity. This is likely caused by the absence of any nesting between electron and hole bands.

5 pages, 4 figures

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Cited by in corpus (2)

• High Electron Mobility, Quantum Hall Effect and Anomalous Optical Response in Atomically Thin InSe
• Quantum oscillations and upper critical magnetic field of the iron-based superconductor FeSe