%0 Journal Article %K Titanium compounds %K Electric fields %K Lanthanum compounds %K Strontium titanates %K Heterojunctions %K Aluminum compounds %K Vanadium compounds %K Electron gas %K Phase interfaces %K Built-in potential %K Capacitance measurement %K Built-in electric fields %K Device architectures %K Electrostatic stability %K Induced dipole moments %K Induced polarization %K Metallic electrodes %K SrTiO3 substrates %A G Singh-Bhalla %A C Bell %A J Ravichandran %A W Siemons %A Y Hikita %A S Salahuddin %A A.F Hebard %A H.Y Hwang %A Ramamoorthy Ramesh %B Nature Physics %D 2011 %G eng %I Nature Publishing Group %P 80-86 %R 10.1038/nphys1814 %T Built-in and induced polarization across LaAlO 3 /SrTiO 3 heterojunctions %V 7