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Doping-dependent band structure of LaAlO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>/SrTiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>interfaces by soft x-ray polarization-controlled resonant angle-resolved photoemission
Polarization-controlled synchrotron radiation was used to map the electronic structure of buried conducting interfaces of LaAlO${}_{3}$/SrTiO${}_{3}$ in a resonant angle-resolved photoemission experiment. A strong polarization dependence of the Fermi surface and band dispersions is demonstrated, highlighting different Ti $3d$ orbitals involved in two-dimensional (2D) conduction. Measurements on samples with different …