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Journal Article

Layer-by-Layer Evolution of a Two-Dimensional Electron Gas Near an Oxide Interface

MPS-Authors

Chang,  Jun Young
Advanced Light Source (ALS), E. O. Lawrence Berkeley National Laboratory, Berkeley, California;
Department of Physics, University of Seoul;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons71830

Walter,  Andrew L.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Advanced Light Source (ALS), E. O. Lawrence Berkeley National Laboratory, Berkeley, California;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21640

Horn,  Karsten
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

e126401.pdf
(Publisher version), 3MB

Supplementary Material (public)
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Citation

Chang, J. Y., Moreschini, L., Bostwick, A., Gaines, G. A., Kim, Y. S., Walter, A. L., et al. (2013). Layer-by-Layer Evolution of a Two-Dimensional Electron Gas Near an Oxide Interface. Physical Review Letters, 111(12): 126401. doi:10.1103/PhysRevLett.111.126401.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-746D-0
Abstract
We report the momentum-resolved measurement of a two-dimensional electron gas at the LaTiO3/SrTiO3 interface by angle-resolved photoemission spectroscopy (ARPES). Thanks to an advanced sample preparation technique, the orbital character of the conduction electrons and the electronic correlations can be accessed quantitatively as each unit cell layer is added. We find that all of these quantities change dramatically with distance from the interface. These findings open the way to analogous studies on other heterostructures, which are traditionally a forbidden field for ARPES.