Atomic Scale Imaging of Competing Polar States in a Ruddlesden-Popper Layered Oxide
Greg Stone,​ Colin Ophus, ​Turan Birol,​ Jim Ciston,​ Che­Hui Lee,​ Ke Wang, Craig J. Fennie, Darrell G. Schlom,​ Nasim Alem, ​& Venkatraman Gopalan
Nature Communications 7, 12572 (2016)
 
Confirms part of 
 
Interface control of emergent ferroic order in Ruddlesden-Popper Srn+1TinO3n+1
Turan Birol, Nicole A. Benedek, & Craig J. Fennie
Physical Review Letters 107, 257602 (2011).