TY  - JOUR
AU  - Wang, Qisi
AU  - Shen, Yao
AU  - Pan, Bingying
AU  - Hao, Yiqing
AU  - Ma, Mingwei
AU  - Zhou, Fang
AU  - Steffens, P.
AU  - Schmalzl, K.
AU  - Forrest, T. R.
AU  - Abdel-Hafiez, M.
AU  - Chen, Xiaojia
AU  - Chareev, D. A.
AU  - Vasiliev, A. N.
AU  - Bourges, P.
AU  - Sidis, Y.
AU  - Cao, Huibo
AU  - Zhao, Jun
TI  - Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
JO  - Nature materials
VL  - 15
SN  - 1476-4660
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - FZJ-2015-07735
SP  - 159–163
PY  - 2016
AB  - In iron-based superconductors the interactions driving the nematic order (that breaks four-fold rotational symmetry in the iron plane) may also mediate the Cooper pairing1. The experimental determination of these interactions, which are believed to depend on the orbital or the spin degrees of freedom1, 2, 3, 4, is challenging because nematic order occurs at, or slightly above, the ordering temperature of a stripe magnetic phase1, 5. Here, we study FeSe (ref. 6)—which exhibits a nematic (orthorhombic) phase transition at Ts = 90 K without antiferromagnetic ordering—by neutron scattering, finding substantial stripe spin fluctuations coupled with the nematicity that are enhanced abruptly on cooling through Ts. A sharp spin resonance develops in the superconducting state, whose energy (~4 meV) is consistent with an electron–boson coupling mode revealed by scanning tunnelling spectroscopy7. The magnetic spectral weight in FeSe is found to be comparable to that of the iron arsenides8, 9. Our results support recent theoretical proposals that both nematicity and superconductivity are driven by spin fluctuations
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000368766100016
C6  - pmid:26641018
DO  - DOI:10.1038/nmat4492
UR  - https://juser.fz-juelich.de/record/279857
ER  -