Fermi surface of the superconductor BaIr2P2
"Fermi surface of the superconductor BaIr2P2", T. Förster, B. Bergk, O. Ignatchik, M. Bartkowiak, S. Blackburn, M. Côté, G. Seyfarth, N. Berry, Z. Fisk, I. Sheikin, A.D. Bianchi, and J. Wosnitza, Phys. Rev. B 92, 134518 (2015).
We report on de Haas–van Alphen (dHvA) and band-structure studies of the iridium-pnictide superconductor BaIr2P2 (Tc=2.1 K). The observed dHvA frequencies can be well understood by our band-structure calculations with two bands crossing the Fermi energy leading to a strongly corrugated Fermi-surface cylinder around the X point and a highly evolved, multiconnected Fermi surface extending over the whole Brillouin zone. The experimental effective masses are found to be considerably larger than the calculated band masses suggesting strong many-body interactions. Nevertheless, Tc remains only moderate in BaIr2P2 contrary to isostructural iron pnictides which probably is related to the largely different Fermi-surface topologies in these materials.
Ce contenu a été mis à jour le 26 avril 2016 à 3 h 12 min.