δ-doped LaAlO3-SrTiO3 interface: Electrical transport and characterization of the interface potentialA. Rastogi, S. Tiwari, J. J. Pulikkotil, Z. Hossain, D. Kumar and R. C. BudhaniEPL, 106 5 (2014) 57002DOI: https://doi.org/10.1209/0295-5075/106/57002