Fermi surface of the superconductor BaIr 2 P 2
Year: 2015
Type: article
Abstract: We report on de Haas--van Alphen (dHvA) and band-structure studies of the iridium-pnictide superconductor ${\mathrm{BaIr}}_{2}{\mathrm{P}}_{2}$ (${T}_{c}=2.1$ 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, ${T}_{c}$ remains only moderate in ${\mathrm{BaIr}}_{2}{\mathrm{P}}_{2}$ contrary to isostructural iron pnictides which probably is related to the largely different Fermi-surface topologies in these materials.
Source: Physical Review B
Institutions: Helmholtz-Zentrum Dresden-Rossendorf, Dresden High Magnetic Field Laboratory, Paul Scherrer Institute, Université de Montréal, Centre National de la Recherche Scientifique, Université Joseph Fourier, University of California, Irvine, Laboratoire National des Champs Magnétiques Intenses, Technische Universität Dresden
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Award: G2438661295
OpenAlex ID: W2395072062