Competing Lattice and Defect Dynamics Govern Terahertz-Induced Ferroelectricity in Quantum Paraelectric SrTiO${}_3$

L. Cheng, K. Hu, S. Yang +3

Intense terahertz (THz) pulses induce transient inversion-symmetry breaking in quantum paraelectric SrTiO${}_3$, yet the underlying mechanism remains controversial. Using fields up t…