Role of Dirac cones in magnetotransport properties of REFeAsO (RE=rare earth) oxypnictides

Abstract

In this work we study the effect of the rare earth element in iron oxypnictides of composition REFeAsO (RE=rare earth). On one hand we carry out Density Functional Theory calculations of the band structure, which evidence the multiband character of these compounds and the presence of Dirac cones along the Y-Γ and Z-R directions of the reciprocal space. On the other hand, we explore transport behavior by means of resistivity, Hall resistance and magnetoresistance measurements, which confirm the dominant role of Dirac cones. By combining our theoretical and experimental approaches, we extract information on effective masses, scattering rates and Fermi velocities for different rare earth elements.

13 pages, 5 figures accepted for publication on European Journal of Physics B

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Cited by in corpus (7)

• Evolution of the Phase Diagram of LaFeP${}_{1-x}$As${}_x$O${}_{1-y}$F${}_y$ ($y$ = 0 -- 0.1)
• Thermoelectric properties of iron-based superconductors and parent compounds
• Fermi surface with Dirac fermions in CaFeAsF determined via quantum oscillation measurements
• Topological Surface States in Paramagnetic and Antiferromagnetic Iron Pnictides
• Exotic rare earth-based materials for emerging spintronic technology
• Magneto Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario
• Evidence of the isoelectronic character of F doping in SmFeAsO(1-x)F(x): a first-principles investigation