Piezoelectricity in K
1−
x
Na
x
NbO
3
: First-principles calculation
*
Li Qiang, Zhang Rui†
, Lv Tian-Quan‡
, Zheng Li-Mei
Orientation dependence of piezoelectric coefficient of the orthorhombic K
1− x
Na
x
NbO
3
with x = 0.5 and x = 0.0.