Quantum oscillations and upper critical magnetic field of the iron-based superconductor FeSe

Abstract

Shubnikov-de Haas (SdH) oscillations and upper critical magnetic field ($H\_c2$) of the iron-based superconductor FeSe ($T\_c$ = 8.6 K) have been studied by tunnel diode oscillator-based measurements in magnetic fields of up to 55 T and temperatures down to 1.6 K. Several Fourier components enter the SdH oscillations spectrum with frequencies definitely smaller than predicted by band structure calculations indicating band renormalization and reconstruction of the Fermi surface at low temperature, in line with previous ARPES data. The Werthamer-Helfand-Hohenberg model accounts for the temperature dependence of $H\_c2$ for magnetic field applied both parallel (\textbf{H} $\Vert$ $ab$) and perpendicular (\textbf{H} $\Vert$ $c$) to the iron conducting plane, suggesting that one band mainly controls the superconducting properties in magnetic fields despite the multiband nature of the Fermi surface. Whereas Pauli pair breaking is negligible for \textbf{H} $\Vert$ $c$, a Pauli paramagnetic contribution is evidenced for \textbf{H} $\Vert$ $ab$ with Maki parameter $\alpha$ = 2.1, corresponding to Pauli field $H\_P$ = 36.5 T

References in corpus (10)

• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
• Reconstruction of Band Structure Induced by Electronic Nematicity in an FeSe Superconductor
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• Hall effect and resistivity study of the magnetic transition, carrier content and Fermi liquid behavior in Ba(Fe(1-x) Cox)2As2
• Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements
• Multiband effects on beta-FeSe single crystals
• Anisotropic fluctuations and quasiparticle excitations in FeSe_0.5Te_0.5
• Fermi-surface topology of the iron pnictide LaFe${}_2$P${}_2$

Cited by in corpus (17)

• Emergence of the nematic electronic state in FeSe
• Nematicity, magnetism and superconductivity in FeSe
• The key ingredients of the electronic structure of FeSe
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Strong $(\pi ,0)$ spin fluctuations in $\beta$-FeSe observed by neutron spectroscopy
• Pressure-induced antiferromagnetic transition and phase diagram in FeSe
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Singular magnetic anisotropy in the nematic phase of FeSe
• Superconducting FeSe monolayer with milli-electron volt Fermi energy
• Upper critical field and quantum oscillations in tetragonal superconducting FeS
• Magnetic oscillations measure interlayer coupling in cuprate superconductors
• Unveiling the quasiparticle behaviour in the pressure-induced high-$T_c$ phase of an iron-chalcogenide superconductor
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Temperature dependence and limiting mechanisms of the upper critical field of FeSe thin films
• Unusual normal and superconducting state properties observed in hydrothermal Fe1-xSe flakes
• In-plane and interlayer magnetoresistance in FeSe
• A mesoscopic device for a realization of the Topological Kondo effect