Observation of Ising spin-nematic order and its close relationship to the superconductivity in FeSe single crystals

Abstract

Superconducting FeSe single crystals of (001) orientation are synthesized via a hydrothermal ion-release route. An Ising spin-nematic order is identified by our systematic measurements of in-plane angular-dependent magnetoresistance (AMR) and static magnetization. The turn-on temperature of anisotropic AMR signifies the Ising spin-nematic ordering temperature Tsn, below which a two-fold rotational symmetry is observed in the iron plane. A downward curvature appears below Tsn in the temperature dependence of static magnetization for the weak in-plane magnetic field as reported previously. Remarkably, we find a universal linear relationship between Tc and Tsn among various superconducting samples, indicating that the spin nematicity and the superconductivity in FeSe have a common microscopic origin.

13 pages, 4 figures

References in corpus (14)

• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Theory of Electron Nematic Order in LaOFeAs
• The Structural Phase Transition in FeSe (Fe1+dSe)
• Structure determination and coexistence of superconductivity and antiferromagnetic order in (Li0.8Fe0.2)OHFeSe
• Orbital-driven nematicity in FeSe
• Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe
• The origin of nematic order in FeSe
• Strong $(\pi ,0)$ spin fluctuations in $\beta$-FeSe observed by neutron spectroscopy
• Phase diagram of (Li1-xFex)OHFeSe: a bridge between iron selenide and arsenide superconductors
• Electron carriers with possible Dirac-cone-like dispersion in FeSe${}_{1-x}$S${}_x$ ($x$ = 0 and 0.14) single crystals triggered by structural transition
• Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe

Cited by in corpus (5)

• Charge order driven by multiple-Q spin fluctuations in heavily electron-doped iron selenide superconductors
• Low work function in the 122-family of iron-based superconductors
• Magnetic-Field-Induced Spin Nematicity in FeSe1-xSx and FeSe1-yTey Superconductor Systems
• Interplay between nematic fluctuation and superconductivity in the two-orbital Hubbard model: A quantum Monte Carlo study
• Electronic and Superconducting Properties of Some FeSe-based Single Crystals and Films Grown Hydrothermally