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

S. Blackburn; B. Prévost; M. Bartkowiak; O. Ignatchik; A. Polyakov; T. Förster; M. Côté; G. Seyfarth; C. Capan; Z. Fisk; R. G. Goodrich; I. Sheikin; H. Rosner; A. D. Bianchi; J. Wosnitza

doi:10.1103/PhysRevB.89.220505

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

Superconductivity 2014-06-24 v1

Authors: S. Blackburn , B. Prévost , M. Bartkowiak , O. Ignatchik , A. Polyakov , T. Förster , M. Côté , G. Seyfarth , C. Capan , Z. Fisk , R. G. Goodrich , I. Sheikin , H. Rosner , A. D. Bianchi , J. Wosnitza

View on arXiv ↗ PDF ↗ DOI ↗

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.

Keywords

de haas-van alphen effect fermi surface topology lafe$_2$p$_2$ iron pnictides density-functional theory s$_\pm$ pairing band nesting

Cite

@article{arxiv.1406.5642,
  title  = {Fermi-surface topology of the iron pnictide LaFe$_2$P$_2$},
  author = {S. Blackburn and B. Prévost and M. Bartkowiak and O. Ignatchik and A. Polyakov and T. Förster and M. Côté and G. Seyfarth and C. Capan and Z. Fisk and R. G. Goodrich and I. Sheikin and H. Rosner and A. D. Bianchi and J. Wosnitza},
  journal= {arXiv preprint arXiv:1406.5642},
  year   = {2014}
}

Comments

5 pages, 4 figures

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

Abstract

Keywords

Cite

Comments

Related papers