Electronic and spin reconstruction at complex oxide interfaces
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Electronic and spin reconstruction at complex oxide interfaces
CIC nanoGUNE Seminars
- Speaker
-
Jacobo Santamaría, Universidad Complutense de Madrid, Madrid, Spain
- When
-
2011/01/31
13:00
- Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
- Add to calendar
-
iCal
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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