Influence of orbital nematic order on spin responses in Fe-based superconductors

• The orbital nematic order can drive a significant nematicity in the spin fluctuations.
• The orbital nematic order can enhance the strength of the antiferromagnetic spin fluctuations.
• The orbital nematic order cannot be taken as an unimportant secondary effect of the nematic state in Fe-based superconductors.

Electronic nematicity is ubiquitous in Fe-based superconductors, but what the primary nematic order is and how the various nematic phenomena correlate with each other are still elusive. In this manuscript we study the physical consequence of the orbital nematic order on the spin correlations. We find that the orbital nematic order can drive a significant spin nematicity and can enhance the integrated intensity of the spin fluctuations. Our study shows that the orbital nematic order has strong effect on the spin correlations and it can not be taken as an unimportant secondary effect of the nematic state in Fe-based superconductors.