Quantum-fluctuation-stabilized orthorhombic ferroelectric ground state in lead-free piezoelectric (Ba, Ca) (Zr, Ti) O3
A. Akbarzadeh, K. Brajesh, Y. Nahas, N. Kumar, S. Prokhorenko, D. Swain, S. Prosandeev, R. Walter, I. Kornev, J. Íñiguez, B. Dkhil, R. Ranjan, and L. Bellaiche
Physical Review B, vol. 98, no. 10, art. no. 104101, 2018
doi:10.1103/PhysRevB.98.104101