Fermi surface in BaNi$_2$P$_2$
Taichi Terashima, Motoi Kimata, Hidetaka Satsukawa, Atsushi Harada,, Kaori Hazama, Motoharu Imai, Shinya Uji, Hijiri Kito, Akira Iyo, Hiroshi, Eisaki, Hisatomo Harima
TL;DR
This study combines experimental dHvA oscillation measurements with band structure calculations to characterize the Fermi surface of BaNi$_2$P$_2$, revealing a large, three-dimensional Fermi surface distinct from iron-pnictide high-$T_c$ superconductors.
Contribution
It provides the first detailed experimental and theoretical analysis of the Fermi surface in BaNi$_2$P$_2$, highlighting its differences from related iron-based superconductors.
Findings
Fermi surface encloses about one electron and hole per formula unit
Fermi surface is large and three-dimensional
Mass enhancement factor is approximately two
Abstract
We report measurements of the de Haas-van Alphen (dHvA) oscillation and a band structure calculation for the pnictide superconductor BaNiP, which is isostructural to BaFeAs, the mother compound of the iron-pnictide high- superconductor (BaK)FeAs. Six dHvA-frequency branches with frequencies up to 8 kT were observed, and they are in excellent agreement with results of the band-structure calculation. The determined Fermi surface is large, enclosing about one electron and hole per formula unit, and three-dimensional. This is in contrast to the small two-dimensional Fermi surface expected for the iron-pnictide high- superconductors. The mass enhancement is about two.
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Taxonomy
TopicsTopological Materials and Phenomena · Surface and Thin Film Phenomena · Rare-earth and actinide compounds