Electronic and spin reconstruction at complex oxide interfaces

CIC nanoGUNE Seminars

Jacobo Santamaría, Universidad Complutense de Madrid, Madrid, Spain
nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
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Electronic and spin reconstruction  at complex oxide interfaces The discovery of unexpected properties at the interfaces between complex oxides have triggered the launch of a novel field of research which has produced a number of exciting results in recent years. The main thrust of this emerging field comes from its promise of independently manipulating important quantities controlling electron correlations. Controlling the state of strain has a direct influence on important parameters such as band width or hopping integral and eventually also on orbital occupancy and ordering. Modified bonding at the interface may be at the bottom of the appearance of interesting novel behaviours not appearing in the bulk constituents. Charge transfer processes resulting from differences in the electrochemical potential or other phenomena may allow modifications of doping, a variable which critically controls the electronic properties in these materials. And finally, the discontinuity in the electrostatic repulsion may give rise competition or coupling between order parameters, thus allowing to tailor the interactions which ultimately control the electronic properties. The possibility of tailoring the electronic structure of interfaces has driven an important effort towards the design of interfaces with specific functionalities for device applications. In this talk I will examine several interface problems in oxide heterostructures with special focus on their functionalities and possible device applications