Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe

Abstract

The resistivity $\rho$ and Hall resistivity ${\rho }_H$ are measured on FeSe at pressures up to $P$ = 28.3 kbar in magnetic fields up to $B$ = 14.5 T. The $\rho (B)$ and ${\rho }_H(B)$ curves are analyzed with multicarrier models to estimate the carrier density and mobility as a function of $P$ and temperature ($T⩽$ 110 K). It is shown that the pressure-induced antiferromagnetic transition is accompanied by an abrupt reduction of the carrier density and scattering. This indicates that the electronic structure is reconstructed significantly by the antiferromagnetic order.

arXiv comment6 pages, 5 figures + SM ( 2 pages, 2 figures)

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• High-Tc superconductivity in FeSe at high pressure: Dominant hole carriers and enhanced spin fluctuations
• Highly anisotropic superconducting gaps and possible evidence of antiferromagnetic order in FeSe single crystals
• Weakening of the diamagnetic shielding in FeSe${}_{1-x}$S${}_x$ at high pressures
• Highly mobile carriers in orthorhombic phases of iron-based superconductors FeSe${}_{1-x}$S${}_x$
• Influence of disorder on the signature of pseudogap and multigap superconducting behavior in FeSe
• Upper critical field and quantum oscillations in tetragonal superconducting FeS
• Emergent high-spin state above 7 GPa in superconducting FeSe
• Observation of Ising spin-nematic order and its close relationship to the superconductivity in FeSe single crystals
• Synergy and competition between superconductivity and antiferromagnetism in FeSe under pressure
• Nematic state of the FeSe superconductor
• Multipolar nematic state of nonmagnetic FeSe based on the DFT+$U$
• High-throughput investigation of tunable superconductivity in FeSe films
• Robust superconductivity and fragile magnetism induced by the strong Cu impurity scattering in the high-pressure phase of FeSe
• Magnetotransport properties of FeSe in fields up to 50T
• Transport evidence for twin-boundary pinning of superconducting vortices in FeSe
• In-plane and interlayer magnetoresistance in FeSe
• Short-lived electron excitations in $\mathrm{FeT}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{e}}_{\mathrm{x}}$ as revealed by microwave absorption