High-
Tc
iron phosphide superconductivity enhanced by reemergent antiferromagnetic spin fluctuations in
[Sr4Sc2O6]Fe2(As1−xPx)2
probed by NMR
F. Sakano, K. Nakamura, T. Kouchi, T. Shiota, F. Engetsu, K. Suzuki, R. Horikawa, M. Yashima, S. Miyasaka, S. Tajima, A. Iyo, Y. -F. Guo, K. Yamaura, E. Takayama-Muromachi, M. Yogi, H. Mukuda.