Polar ZnO thin-film nonvolatile transistors with (Bi, Nd)4Ti3O12 gate insulators Q. H. Tan, J. B. Wang, X. L. Zhong, Q. J. Wang, Y. Zhang and Y. C. Zhou EPL, 97 5 (2012) 57012 Published online: 05 March 2012 DOI: 10.1209/0295-5075/97/57012