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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.

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Presenters

  • 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

Authors

  • 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

  • Yiming Wang

    Department of Physics, Renmin University of China

  • Wenjun Hu

    Department of Physics and Astronomy, University of Tennessee, Knoxvill, University of Tennessee

  • Qimiao Si

    Department of Physics and Astronomy, Rice University, Rice Univ, Physics and Astronomy, Rice University, Rice University