Atomic resolution ptychographic phase contrast imaging of polar-ordered structures in functional oxides. (23rd September 2015) - MacLaren, Ian; Yang, Hao; Jones, Lewys; Nellist, Peter D.; Ryll, Henning; Simson, Martin; Soltau, Heike; Kondo, Yukihito; Sagawa, Ryusuke; Banba, Hiroyuki