Quantum Oscillations in EuFe2As2 single crystals

Abstract

Quantum oscillation measurements can provide important information about the Fermi surface (FS) properties of strongly correlated metals. Here, we report a Shubnikov-de Haas (SdH) effect study on the pnictide parent compounds EuFe${}_2$As${}_2$ (Eu122) and BaFe${}_2$As${}_2$ (Ba122) grown by In-flux. Although both members are isovalent compounds with approximately the same density of states at the Fermi level, our results reveal subtle changes in their fermiology. Eu122 displays a complex pattern in the Fourier spectrum, with band splitting, magnetic breakdown orbits, and effective masses sistematically larger when compared to Ba122, indicating that the former is a more correlated metal. Moreover, the observed pockets in Eu122 are more isotropic and 3D-like, suggesting an equal contribution from the Fe $3d$ orbitals to the FS. We speculate that these FS changes may be responsible for the higher spin-density wave ordering temperature in Eu122.

5 pages, 4 figures

References in corpus (16)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Electrical Resistivity and Specific Heat of EuFe2As2 Single Crystals: Magnetic homologue of SrFe2As2
• Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor
• Metamagnetic transition in EuFe${}_2$As${}_2$ single crystals
• Quantum oscillations in the parent pnictide BaFe${}_2$As${}_2$ : itinerant electrons in the reconstructed state
• Complete Fermi surface in BaFe${}_2$As${}_2$ observed via Shubnikov-de Haas oscillation measurements on detwinned single crystals
• Pressure and chemical substitution effects in the local atomic structure of BaFe2As2
• Distinct high-T transitions in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• High-Pressure Electrical Resistivity Measurements of EuFe2As2 Single Crystals

Cited by in corpus (3)

• Fermi surface with Dirac fermions in CaFeAsF determined via quantum oscillation measurements
• In-plane anisotropy of transport coefficients in the electronic nematic states: Universal origin of the nematicity in Fe-based superconductors
• In-plane anisotropic magnetoresistance in detwinned $BaF{e}_{2-x}N{i}_{x}A{s}_2$ ($x$ = 0, 0.6)