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Title: NMR evidence for inhomogeneous nematic fluctuations in BaFe 2 ( As 1 - x P x ) 2

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [4];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. IFW Dresden, Dresden (Germany)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States)

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. Finally, these results suggest that glassy nematic dynamics are a common phenomenon in the ironbased superconductors.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
FG52-09NA29464; AC02-76SF00515; SC0012336; AC52-06NA25396; NA0001842
OSTI ID:
1255258
Alternate ID(s):
OSTI ID: 1241398; OSTI ID: 1261079; OSTI ID: 1343601
Report Number(s):
LA-UR-15-28205; SLAC-PUB-16595; PRLTAO
Journal Information:
Physical Review Letters, Vol. 116, Issue 10; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (5)

Unconventional charge order in a co-doped high-Tc superconductor journal September 2016
c-axis pressure-induced antiferromagnetic order in optimally P-doped BaFe2(As0.70P0.30)2 superconductor journal September 2018
A tale of two metals: contrasting criticalities in the pnictides and hole-doped cuprates journal March 2018
NMR investigation of antiferromagnetism and coherence in URu 2 Si 2 x P x journal January 2017
Transient electronic anisotropy in overdoped NaF e 1 x C o x As superconductors journal January 2018