Multiple lattice instabilities and complex ground state in Cs${}_2$AgBiBr${}_6$

Xing He, Matthew Krogstad, Mayanak K Gupta +11

Metal halides perovskites (MHPs) are attracting considerable interest for optoelectronic applications, with Cs${}_2$AgBiBr${}_6$ one of the main contenders among lead-free systems. Cs$…