This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1038/nmat4492 in citations.
Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
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 freedo...
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Personal Name(s): | Wang, Qisi |
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Shen, Yao / Pan, Bingying / Hao, Yiqing / Ma, Mingwei / Zhou, Fang / Steffens, P. / Schmalzl, K. / Forrest, T. R. / Abdel-Hafiez, M. / Chen, Xiaojia / Chareev, D. A. / Vasiliev, A. N. / Bourges, P. / Sidis, Y. / Cao, Huibo / Zhao, Jun (Corresponding author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL Streumethoden; PGI-4 |
Published in: | Nature materials, 15 (2016) S. 159–163 |
Imprint: |
Basingstoke
Nature Publishing Group
2016
|
DOI: |
10.1038/nmat4492 |
PubMed ID: |
26641018 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Publikationsportal JuSER |
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 |