Fermi surface in BaNi$_2$P$_2$

Details Fermi surface in BaNi$_2$P$_2$ Fermi surface in BaNi$_2$P$_2$

2009-01-22

arxiv.org/abs/0901.3394v3

J. Phys. Soc. Jpn. 78 (2009) 033706 (4 pages)

Physics

Condensed Matter

Superconductivity

To appear in J. Phys. Soc. Jpn., Vol. 78, No. 3

Scientific paper

10.1143/JPSJ.78.033706

We report measurements of the de Haas-van Alphen (dHvA) oscillation and a band structure calculation for the pnictide superconductor BaNi$_2$P$_2$, which is isostructural to BaFe$_2$As$_2$, the mother compound of the iron-pnictide high-$T_c$ superconductor (Ba$_{1-x}$K$_x$)Fe$_2$As$_2$. Six dHvA-frequency branches with frequencies up to $\sim$8 kT were observed, and they are in excellent agreement with results of the band-structure calculation. The determined Fermi surface is large, enclosing about one electron and hole per formula unit, and three-dimensional. This is in contrast to the small two-dimensional Fermi surface expected for the iron-pnictide high-$T_c$ superconductors. The mass enhancement is about two.

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