Electronic structure of BaNi${}_2$P${}_2$ observed by angle-resolved photoemission spectroscopy

Abstract

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of BaNi${}_2$P${}_2$ which shows a superconducting transition at $T_c$ $\sim$ 2.5 K. We observed hole and electron Fermi surfaces (FSs) around the Brillouin zone center and corner, respectively, and the shapes of the hole FSs dramatically changed with photon energy, indicating strong three-dimensionality. The observed FSs are consistent with band-structure calculation and de Haas-van Alphen measurements. The mass enhancement factors estimated in the normal state were $m^{\ast }$/$m_b$ $\le$ 2, indicating weak electron correlation compared to typical iron-pnictide superconductors. An electron-like Fermi surface around the Z point was observed in contrast with BaNi${}_2$As${}_2$ and may be related to the higher $T_c$ of BaNi${}_2$P${}_2$.

6 figures

References in corpus (9)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Resonant and crossover phenomena in a multiband superconductor tuning the chemical potential near a band edge
• First Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals
• Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2
• Superconductivity in SrNi2As2 Single Crystals
• Superconductivity and the Effects of Pressure and Structure in Single Crystalline SrNi${}_2$P${}_2$
• Electronic structure of BaNi${}_2$As${}_2$
• Fermi surface in BaNi${}_2$P${}_2$

Cited by in corpus (6)

• Role of the orbital degree of freedom in iron-based superconductors
• Intrinsic arrested nanoscale phase separation near a topological Lifshitz transition in strongly correlated two-band metals
• Tetragonality induced superconductivity in anti-ThCr${}_2$Si${}_2$-type $R{E}_2$O${}_2$Bi ($RE$ = rare earth) with Bi square net
• Anomalous Pressure Dependence of the Superconducting Transition Temperature in TlNi${}_2$Se${}_{2-x}$S${}_x$
• Angle-resolved spectroscopy study of Ni-based superconductor SrNi${}_2$As${}_2$
• Optical properties of TlNi2Se2: Observation of pseudogap formation