Strain effects in Fe-based superconductors: Nematicity, exotic magnetism and superelasticity*

In this talk we will analyze the role of strain
in some families of Fe-based superconductors.
Via a combination of first principles-based calculations and many-body approaches
we investigate nematicity, possible exotic magnetism and
superelasticity in 122 and 1144 systems [1,2]
and discuss possible origins of the discrepancy between ARPES measurements and
electronic structure calculations in the nematic phase of FeSe [3] with the help of strain.
This work is a collaboration with Paul Canfield, Seok-Woo Lee, Rafael Fernandes, Peter Hirschfeld and Brian Andersen

[1] V. Borisov, R. M. Fernandes, R. Valenti Phys. Rev. Lett. 123, 146402 (2019)
[2] Song et al. APL Mater. 7, 061104 (2019)
[3] Zantout et al. (in preparation)