NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure

2017/11/02 by P. Wiecki, M. Nandi, A. E. Böhmer +5 · 39 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Iron-based superconductors research #Lattice (music) #Liquid crystal #Magnetism #Materials science #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Relaxation (psychology) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.96.180502

published in Physical review. B./Physical review. B 96(18) (American Physical Society) · 5 pages, 5 figures, accepted for publication in Phys. Rev. B rapid communication

arxiv created 2017/11/02 · openalex publication_date 2017/11/13 · arxiv updated 2017/12/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present ⁷⁷Se-NMR measurements on single-crystalline FeSe under pressures up to 2 GPa. Based on the observation of the splitting and broadening of the NMR spectrum due to structural twin domains, we discovered that static, local nematic ordering exists well above the bulk nematic ordering temperature, T_s. The static, local nematic order and the low-energy stripe-type antiferromagnetic spin fluctuations, as revealed by NMR spin-lattice relaxation rate measurements, are both insensitive to pressure application. These NMR results provide clear evidence for the microscopic cooperation between magnetism and local nematicity in FeSe.

Citations

• Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
• The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
• Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe