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Title: NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
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  1. Univ. of California, Davis, CA (United States)
  2. Iowa State Univ., Ames, IA (United States)
  3. Florida State Univ., Tallahassee, FL (United States)
  4. IFW Dresden, Dresden (Germany)

We present 75As nuclear magnetic resonance spin-lattice and spin-spin relaxation rate data in Ba(Fe1–xCox)2As2 and Ba(Fe1–xCux)2As2 as a function of temperature, doping, and magnetic field. The relaxation curves exhibit a broad distribution of relaxation rates, consistent with inhomogeneous glassy behavior up to 100 K. The doping and temperature response of the width of the dynamical heterogeneity is similar to that of the nematic susceptibility measured by elastoresistance measurements. Lastly, we argue that quenched random fields which couple to the nematic order give rise to a nematic glass that is reflected in the spin dynamics.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
DMR1005393; DMR1157490; GR3330/2; AC02-07CH11358; AC52-06NA25396
OSTI ID:
1227431
Alternate ID(s):
OSTI ID: 1223737; OSTI ID: 1321766
Report Number(s):
IS-J-8837; LA-UR-15-27695; PRBMDO
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 16; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (8)

Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2 journal March 2018
Tuning the interplay between nematicity and spin fluctuations in Na1−xLi x FeAs superconductors journal May 2018
Strain relaxation behaviour of vortices in a multiferroic superconductor journal February 2019
Ferroelasticity, anelasticity and magnetoelastic relaxation in Co-doped iron pnictide: Ba(Fe 0.957 Co 0.043 ) 2 As 2 journal February 2019
NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba ( Fe 1 x Co x ) 2 As 2 journal October 2016
Magnetic ground state of KCr 3 As 3 journal May 2019
Ferroelasticity, anelasticity and magnetoelastic relaxation in Co-doped iron pnictide: Ba(Fe0.957Co0.043)₂As₂ text January 2019
Strain relaxation behaviour of vortices in a multiferroic superconductor text January 2019

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