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Spectroscopic evidence of in-gap states at the SrTiO3/LaAlO3 ultrathin interfaces
被引:44
作者:

Drera, G.
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Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Banfi, F.
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Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Canova, F. Federici
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Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Borghetti, P.
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Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Sangaletti, L.
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Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Bondino, F.
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IOM CNR, Lab TASC, I-34149 Basovizza, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Magnano, E.
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IOM CNR, Lab TASC, I-34149 Basovizza, Italy Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Huijben, J.
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Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Huijben, M.
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Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Rijnders, G.
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Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Blank, D. H. A.
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Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

Hilgenkamp, H.
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Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

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机构:
[1] Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy
[2] IOM CNR, Lab TASC, I-34149 Basovizza, Italy
[3] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
[4] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
关键词:
HETEROSTRUCTURES;
D O I:
10.1063/1.3549177
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
Experimental evidence of differences in the electronic properties of an insulating and a conducting SrTiO3/LaAlO3 interface is provided by soft x-ray spectroscopies. While core level photoemission measurements show that only at the conducting interface Ti ions with 3+ ionization state are present, by using resonant photoemission and x-ray absorption spectroscopies, it is shown that in both samples in-gap states with a Ti 3d character are present, but their density is higher at the conducting interface. (C) 2011 American Institute of Physics. [doi:10.1063/1.3549177]
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