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Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSeстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 марта 2016 г.
- Авторы: Qisi Wang, Yao Shen, Bingying Pan, Yiqing Hao, Mingwei Ma, Fang Zhou, Steffens P., Schmalzl K., Forrest T.R., Abdel-Hafiez M., Xiaojia Chen, Chareev D.A., Vasiliev A.N., Bourges P., Sidis Y., Huibo Cao, Jun Zhao
- Журнал: Nature Materials
- Том: 15
- Год издания: 2016
- Издательство: Nature Publishing Group
- Местоположение издательства: United Kingdom
- Первая страница: 159
- DOI: 10.1038/nmat4492
- Аннотация: 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 freedom is challenging because nematic order occurs at, or slightly above, the ordering temperature of a stripe magnetic phase. Here, we study FeSe 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 spectroscopy. The magnetic spectral weight in FeSe is found to be comparable to that of the iron arsenides. Our results support recent theoretical proposals that both nematicity and superconductivity are driven by spin fluctuations.
- Добавил в систему: Васильев Александр Николаевич