Evolution and Control of Electronic Structures near the Interface of Complex Oxide Heterostructure SmTiO$_{\mathrm{3}}$/SrTiO$_{\mathrm{3}}$

The confined electron system in the quantum well of the transition metal oxide, SrTiO$_{\mathrm{3}}$, embedded in the rare earth titanate, SmTiO$_{\mathrm{3}}$, shows unique properties, such as high carrier density, fermi liquid to non-fermi liquid transition, and pseudo-gap, which can be controlled by changing the shape of the quantum well. We will present a distinct difference in the electronic structures between the different quantum well structures obtained by angle-resolved photoemission spectroscopy (ARPES) measurements, suggesting the possibility to control the orbital character and the electron correlation near the interface as well as carrier density.