Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$-linear resistivity in BaFe$_2$(As$_{1-x}$P$_x$)$_2$

Nikola Maksimovic; Ian M. Hayes; Vikram Nagarajan; Alexei E. Koshelev; John Singleton; Yeonbae Lee; Thomas Schenkel; James G. Analytis

doi:10.1103/PhysRevX.10.041062

paper

Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$ -linear resistivity in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

arXiv:2007.04970 · doi:10.1103/PhysRevX.10.041062

Abstract

The scaling of $H$ -linear magnetoresistance in field and temperature was measured in under-doped (x = 0.19) and optimally-doped (x=0.31)~BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$ . We analyze the data based on an orbital model in the presence of strongly anisotropic quasiparticle spectra and scattering time due to antiferromagnetism. The magnetoresistance is dominated by the properties of small regions of the Fermi surface called `hot spots' where antiferromagnetic excitations induce a large quasiparticle scattering rate. Approximate temperature-magnetic field scaling relations are derived and shown to be consistent with the experimental data. We argue that these results link the origin of linear-in-temperature resistivity to hot spots arising from an antiferromagnetic critical point, and magnetoresistance measurements provide a route to quantify this link.

9 pages, 4 figures, Supplemental Material available on request

Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$ -linear resistivity in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Abstract

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Magnetoresistance scaling, disorder, `hot spots' and the origin of T-linear resistivity in BaFe2​(As1−x​Px​)2​

Abstract

References in corpus (10)

Cited by in corpus (11)

Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$ -linear resistivity in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$