Nature of the charge carriers in LaAlO3-SrTiO3 oxide heterostructures probed using hard X-ray photoelectron spectroscopySumanta Mukherjee, Banabir Pal, Indranil Sarkar, Ambroise van Roekeghem, Wolfgang Drube, H. Takagi, Jobu Matsuno, Silke Biermann and D. D. SarmaEPL, 123 4 (2018) 47003DOI: https://doi.org/10.1209/0295-5075/123/47003