"Arnab Sen Gupta,Hirofumi Akamatsu,Megan E. Strayer,Shiming Lei,Toshihiro Kuge,Koji Fujita,Clarina dela Cruz,Atsushi Togo,I. Tanaka,Katsuhisa Tanaka,Thomas E. Mallouk,Venkatraman Gopalan","Improper Inversion Symmetry Breaking and Piezoelectricity through Oxygen Octahedral Rotations in Layered Perovskite Family, LiRTiO4 (R = Rare Earths)",,"Advanced Electronic Materials",,"Vol. 2","No. 1","p. 1500196",2015,Dec.