Nematicity and in-plane anisotropy of superconductivity in $\beta$-FeSe detected by ${}^{77}$Se nuclear magnetic resonance

Abstract

The recent study of ${}^{77}$Se nuclear magnetic resonance (NMR) in a $\beta$-FeSe single crystal proposed that ferro-orbital order breaks the $90^{\circ }$ $C_4$ rotational symmetry, driving nematic ordering. Here, we report an NMR study of the impact of small strains generated by gluing on nematic state and spin fluctuations. We observe that the local strains strongly affect the nematic transition, considerably enhancing its onset temperature. On the contrary, no effect on low-energy spin fluctuations was found. Furthermore we investigate the interplay of the nematic phase and superconductivity. Our study demonstrates that the twinned nematic domains respond unequivalently to superconductivity, evidencing the twofold $C_2$ symmetry of superconductivity in this material. The obtained results are well understood in terms of the proposed ferro-orbital order.

6 pages, 3 figures, Published in Physical Review B, Rapid Communication

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Cited by in corpus (19)

• Nematicity, magnetism and superconductivity in FeSe
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Strain-tuning of nematicity and superconductivity in single crystals of FeSe
• NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure
• Superconductivity and Nematic Fluctuations in a model of FeSe monolayers: A Determinant Quantum Monte Carlo Study
• Evidence for short-range magnetic order in the nematic phase of FeSe from anisotropic in-plane magnetostriction and susceptibility measurements
• Separate tuning of nematicity and spin fluctuations to unravel the origin of superconductivity in FeSe
• Imaging anisotropic vortex dynamics in FeSe
• Photoinduced ultrafast dynamics of local nematicity and lattice distortions in FeSe crystals
• Charge and nematic orders in AFe${}_2$As${}_2$ (A= Rb,Cs) superconductors
• Iron-based superconductors: tales from the nuclei
• Nematicity and magnetism in LaFeAsO single crystals probed by ${}^{75}$As nuclear magnetic resonance
• Inhomogeneous Knight shift in vortex cores of superconducting FeSe
• Tuning the interplay between nematicity and spin fluctuations in Na${}_{1-x}$Li${}_x$FeAs superconductors
• Disorder-Induced Electronic Nematicity
• Spectral Evidence for Unidirectional Charge Density Wave in Detwinned BaNi${}_2$As${}_2$
• Nematic properties of FeSe${}_{1-x}$Te${}_x$ crystals with a low Te content
• Lifting of gap nodes by disorder in ultranodal superconductor candidate FeSe1-xSx
• Edwards-Anderson parameter and local Ising-nematicity in FeSe revealed via NMR spectral broadening