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Title: NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba ( Fe 1 x Co x ) 2 As 2

Journal Article · · Physical Review B
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States)

We report the experimental details of how mechanical detwinning can be implemented in tandem with high sensitivity nuclear magnetic resonance measurements and use this setup to measure the inplane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1-xCox)2As2 with x = 0:048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.

Research Organization:
Ames Lab., Ames, IA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
DMR-1506961; PHY-1066293; SC0012336; AC02-07CH11358; AC52-06NA25396
OSTI ID:
1335028
Alternate ID(s):
OSTI ID: 1328634; OSTI ID: 1357140
Report Number(s):
IS-J-9132; LA-UR-17-22942; PRBMDO
Journal Information:
Physical Review B, Vol. 94, Issue 16; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors text January 2015
Antiferromagnetic order and spin dynamics in iron-based superconductors text January 2015

Cited By (4)

Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2 journal March 2018
Nuclear magnetic resonance probe head design for precision strain control journal October 2017
Divergence of the quadrupole-strain susceptibility of the electronic nematic system YbRu 2 Ge 2 journal March 2019
Nematic fluctuations in iron arsenides NaFeAs and LiFeAs probed by As 75 NMR journal March 2018