NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Univ. of California, Davis, CA (United States)
- Iowa State Univ., Ames, IA (United States)
- Florida State Univ., Tallahassee, FL (United States)
- 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
Cited by: 32 works
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