Strong trilinear coupling of phonon instabilities drives the avalanche-like hybrid improper ferroelectric transition in SrBi2Nb2O9

Roy, A. P.Bajaj, N.Gupta, A.Sathe, V.Mishra, S. K.Mittal, R.2021-12-202021-12-202021Physical Review-B, 2021. Vol. 103 (13): Article no. 134111http://hdl.handle.net/123456789/237835317 bytestext/htmlenStrong trilinear couplingphonon instabilityavalanche-like hybrid improper ferroelectric transitionSrBi2Nb2O9Strong trilinear coupling of phonon instabilities drives the avalanche-like hybrid improper ferroelectric transition in SrBi2Nb2O9Article