Nematicity from spin correlations in iron-based superconductors
ORAL
Abstract
Electronic nematic order has been the topic of considerable interest in the area of iron-based superconductors. Motivated by recent experimental works, we study the connection between nematic order and magnetic fluctuations. We show, based on a symmetry analysis, that the spin correlations in the system allow for a variety of nematic orders, in particular an unusual B2g nematicity. Using qualitative considerations as well as microscopic calculations, we discuss the types of magnetic fluctuations that stabilize this B2g nematicity and how our proposed mechanism provides a natural understanding of the recent experimental observations in the heavily hole doped iron pnictides (Rb,Cs)Fe2As2. We also discuss the effects associated with the nematic transition.
*This work has been supported by the National Science Foundation of China, Grant No. 11674392, Ministry of Science and Technology of China, National Program on Key Research Project, Grant No. 2016YFA0300504 (R.Y. and Y.W.) and by the DOE BES Award # DE-SC0018197 and the Robert A. Welch Foundation Grant No. C-1411 (W.H. and Q.S.)
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Presenters
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Rong Yu
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China
- Renmin University of China
- Department of Physics, Renmin University of China
- Renmin University
- Tsinghua University