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Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR

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Abstract

We have performed nuclear magnetic resonance (NMR) measurements on an underdoped single-crystal Ba0.77K0.23Fe2As2 with T c = 16.5 K. Below T N = 46 K, an internal magnetic field splits the NMR peaks of H ∥ c and shifts those of H ∥ a to higher frequencies. The nuclear spin-lattice relaxation rate 1/T 1 measured at the central peak with H ∥ a shows a distinct decrease below T c(μ 0 H = 12 T) = 16 K. Our results clearly show that antiferromagnetic order and superconductivity coexist at a microscopical length scale.

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Authors and Affiliations

  1. Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing, 100190, China

    R. Zhou, Z. Li, J. Yang & G. Q. Zheng

  2. Department of Physics, Okayama University, Okayama, 700-8530, Japan

    G. Q. Zheng

Authors
  1. R. Zhou
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  2. Z. Li
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  3. J. Yang
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  4. G. Q. Zheng
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Corresponding author

Correspondence to R. Zhou.

Additional information

Proceedings of the 4th Joint International Conference on Hyperfine Interactions and International Symposium on Nuclear Quadrupole Interactions (HFI/NQI 2012), Beijing, China, 10–14 September 2012.

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Zhou, R., Li, Z., Yang, J. et al. Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR. Hyperfine Interact 222, 95–102 (2013). https://doi.org/10.1007/s10751-013-0862-1

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  • DOI: https://doi.org/10.1007/s10751-013-0862-1

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