Table 1 DFT calculated coefficients for the Landau polynomial.
From: Domain topology and domain switching kinetics in a hybrid improper ferroelectric
Coefficient | α 33 | α 3333 | β 11 | β 1111 | β 1122 | γ 11 | t 3311 | d |
|---|---|---|---|---|---|---|---|---|
Unit | eV f.u.−1 Å−2 | eV f.u.−1 Å−4 | eV f.u.−1 Å−2 | eV f.u.−1 Å−4 | eV f.u.−1 Å−4 | eV f.u.−1 Å−2 | eV f.u.−1 Å−4 | eV f.u.−1 Å−3 |
Value | −0.3505 | 0.1868 | −0.2024 | 0.0527 | 0.0176 | 0.0188 | 0.1464 | −0.1701 |
