%0 Journal Article %T Enhanced electric conductivity at ferroelectric vortex cores in BiFeO3 %A Balke, Nina %A Winchester, Benjamin %A Ren, Wei %A Chu, Ying Hao %A Morozovska, Anna N. %A Eliseev, Eugene A. %A Huijben, Mark %A Vasudevan, Rama K. %A Maksymovych, Petro %A Britson, Jason %A Jesse, Stephen %A Kornev, Igor %A Ramesh, Ramamoorthy %A Bellaiche, Laurent %A Chen, Long Qing %A Kalinin, Sergei V. %J Nature Physics %V 8 %N 1 %P 81-88 %@ 1745-2473 %D 2011-11-06 %I Nature Publishing Group UK %~ DeepDyve