Effects of Lifshitz Transition on Charge Transport in Magnetic Phases of Fe-Based Superconductors

Abstract

The unusual temperature dependence of the resistivity and its in-plane anisotropy observed in the Fe-based superconducting materials, particularly Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$, has been a longstanding puzzle. Here we consider the effect of impurity scattering on the temperature dependence of the average resistivity within a simple two-band model of a dirty spin density wave metal. The sharp drop in resistivity below the Néel temperature $T_N$ in the parent compound can only be understood in terms of a Lifshitz transition following Fermi surface reconstruction upon magnetic ordering. We show that the observed resistivity anisotropy in this phase, arising from nematic defect structures, is affected by the Lifshitz transition as well.

8 pages, 5 figures

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Cited by in corpus (6)

• Lifshitz Transitions in the Ferromagnetic Superconductor UCoGe
• Spin-orbital interplay and topology in the nematic phase of iron pnictides
• Signatures of Lifshitz transition in the optical conductivity of two-dimensional tilted Dirac materials
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Superconductivity on the verge of electronic topological transition in Fe based superconductors
• The role of magnetic excitations in magnetoresistance and Hall effect of slightly TM-substituted BaFe${}_2$As${}_2$ compounds (TM = Mn, Cu, Ni)