2015/10/05 by A. P. Dioguardi, T. Kissikov, C. H. Lin +12 · 4 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Iron-based superconductors research #Liquid crystal #Nuclear magnetic resonance #Nuclear quadrupole resonance #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Relaxation (psychology) #Spin–lattice relaxation #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.116.107202
published as Phys. Rev. Lett. 116, 107202 (2016) · 6 pages, 3 figures
arxiv created 2015/10/05 · openalex publication_date 2016/03/10 · arxiv updated 2016/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations in isovalent P-doped BaFe2As2 single crystals. Both the 75As and 31P sites exhibit a stretched-exponential relaxation similar to the electron-doped systems. By comparing the hyperfine fields and the relaxation rates at these sites we find that the As relaxation cannot be explained solely in terms of magnetic spin fluctuations. We demonstrate that nematic fluctuations couple to the As nuclear quadrupolar moment and can explain the excess relaxation. These results suggest that glassy nematic dynamics are a common phenomenon in the iron-based superconductors.