Observation of orbital ordering and origin of the nematic order in FeSe
arXiv:1810.09639 · doi:10.1088/1367-2630/ab4927
Abstract
To elucidate the origin of nematic order in FeSe, we performed field-dependent 77Se-NMR measurements on single crystals of FeSe. We observed orbital ordering from the splitting of the NMR spectra and Knight shift and a suppression of it with magnetic field B0 up to 16 T applied parallel to the Fe-planes. There is a significant change in the distribution and magnitude of the internal magnetic field across the orbital ordering temperature Torb while stripe-type antiferromagnetism is absent. Giant antiferromagnetic (AFM) spin fluctuations measured by the NMR spin-lattice relaxation are gradually developed starting at ~ 40 K, which is far below the nematic ordering temperature Tnem. These results demonstrate that orbital ordering is the origin of the nematic order, and the AFM spin fluctuation is the driving mechanism of superconductivity in FeSe under the presence of the nematic order.
6 pages, 4 figures
References in corpus (48)
- Superconductivity in Iron Compounds
- High-temperature superconductivity in iron-based materials
- Nematic order in iron superconductors - who is in the driver's seat?
- Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
- Antiferromagnetic order and spin dynamics in iron-based superconductors
- Theory of Electron Nematic Order in LaOFeAs
- The Structural Phase Transition in FeSe (Fe1+dSe)
- Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
- Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors
- Orbital-driven nematicity in FeSe
- Emergence of the nematic electronic state in FeSe
- Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
- Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
- Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
- Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
- Reconstruction of Band Structure Induced by Electronic Nematicity in an FeSe Superconductor
- Uniaxial strain detwinning of CaFe2As2 and BaFe2As2: optical and transport study
- Orbital-Ordering Induces Structural Phase Transition and the Resistivity Anomaly in Iron Pnictides
- Origin of the tetragonal-to-orthorhombic (nematic) phase transition in FeSe: a combined thermodynamic and NMR study
- Contrasting Spin Dynamics Between Underdoped and Overdoped Ba(Fe[1-x]Co[x])2As2
- Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
- Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
- Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
- Pressure Induced Static Magnetic Order in Superconducting FeSe_1-x
- Observation of two distinct band splittings in FeSe
- Origin of Orthorhombic Transition, Magnetic Transition, and Shear Modulus Softening in Iron Pnictide Superconductors: Analysis based on the Orbital Fluctuation Theory
- Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe
- Magnetic properties of the geometrically frustrated S=1/2 antiferromagnets, La2LiMoO6 and Ba2YMoO6, with the B-site ordered double perovskite structure: Evidence for a Collective Spin Singlet Ground State
- Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe
- 59-Co and 75-As NMR Investigation of Electron-Doped High Tc Superconductor BaFe(1.8)Co(0.2)As(2) (Tc = 22K)
- Evidence for Unconventional Superconductivity in Arsenic-Free Iron-Based Superconductor FeSe : A ^77Se-NMR Study
- Pressure Induced Stripe-order Antiferromagnetism and First-order Phase Transition in FeSe
- NMR Search for the Spin Nematic State in LaFeAsO Single Crystal
- Scaling between magnetic and lattice fluctuations in iron-pnictide superconductors
- Orbital-weight redistribution triggered by spin order in the pnictides
- Superconductivity in FeSe: the role of nematic order
- Orbital Origin of Extremely Anisotropic Superconducting Gap in Nematic Phase of FeSe Superconductor
- Stripe antiferromagnetic correlations in LaFeAsO1-xFx probed by 75As NMR
- 23Na and 75As NMR Study of Antiferromagnetism and Spin Fluctuations on NaFeAs Single Crystals
- Prominent role of spin-orbit coupling in FeSe
- Normal state spin dynamics in the iron-pnictide superconductors BaFe2(As1-xPx)2 and Ba(Fe1-xCox)2As2 probed with NMR measurements
- Mossbauer studies on FeSe and FeTe
- Nematic orders in Iron-based superconductors
- Influence of Spin Orbit Coupling in the Iron-Based Superconductors
- Evidence for short-range magnetic order in the nematic phase of FeSe from anisotropic in-plane magnetostriction and susceptibility measurements
- Photoinduced ultrafast dynamics of local nematicity and lattice distortions in FeSe crystals
- NMR measurements of intrinsic spin susceptibility in LaFeAsO(0.9)F(0.1)
- Synergy and competition between superconductivity and antiferromagnetism in FeSe under pressure