Institute for Nanoelectronic Devices and Quantum Computing;
Fudan University;
Shanghai 200433;
China;
Department of Physics&Astronomy;
Louisiana State University;
Baton Rouge;
LA 70803;
Condensed Matter Physics&Materials Science Department;
Brookhaven National Laboratory;
Upton;
NY 11973;
complex; oxide; interfaces; scanning; transmission; electron; microscopy; electron; energy; loss; spectroscopy;