Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)${}_2$

Abstract

Unconventional high temperature superconductivity as well as three-dimensional bulk Dirac cone quantum states arising from the unique d-orbital topology has been a recent priority research area in physics. In iron pnictide compounds, although transport phenomena arisen from this multiple band Fermi surface are intriguing and scientifically important, they still do not give an adequate matching to neither experimental observations on the band picture nor theoretical calculations and a debate continues. Here we describe a new analytical approach of mobility spectrum, in which the carrier number is conveniently described as a function of mobility without any hypothesis about the number of carriers, on both longitudinal and transverse transport of high quality single crystal Ba(FeAs)${}_2$ in a wide range of magnetic field. We show that the major numbers of carriers reside in large parabolic hole and electron pockets with very different topology as well as remarkably different mobility spectra, while the minor number of Dirac carriers resides in both hole- and electron- Dirac quantum states with the largest mobility as high as 70,000 cm${}^2$(Vs)${}^{-1}$.

7 pages, 3 figures

References in corpus (9)

• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetism and Charge Dynamics in Iron Pnictides
• Nodal Spin Density Wave and band topology of the FeAs based materials
• Unprecedented anisotropic metallic state in BaFe2As2 revealed by optical spectroscopy
• Electron and hole Dirac cone states in-pairs in Ba(FeAs)${}_2$ confirmed by magnetoresistance
• Quantum oscillations in the parent pnictide BaFe${}_2$As${}_2$ : itinerant electrons in the reconstructed state
• Topological and Transport Properties of Dirac Fermions in Antiferromagnetic Metallic Phase of Iron-Based Superconductors
• Suppression of backward scattering of Dirac fermions in iron pnictides Ba(Fe${}_{1-x}$Ru${}_x$As)${}_2$
• Ultralow-dissipative conductivity by Dirac fermions in BaFe${}_2$As${}_2$

Cited by in corpus (4)

• Electric Transport of a Single Crystal Iron Chalcogenide FeSe Superconductor: Evidence of Symmetry Breakdown Nematicity and Additional Ultrafast Dirac cone-Like Carriers
• Large negative magnetoresistance in BaMn${}_2$Bi${}_2$ antiferromagnet
• Impact of tiny Fermi pockets with extremely high mobility on the Hall anomaly in the kagome metal CsV${}_3$Sb${}_5$
• Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe${}_{1-x}$Mn${}_x$As)${}_2$