Layer-by-layer evolution of a two-dimensional electron gas near an oxide interface

Young Jun Chang; Luca Moreschini; Aaron Bostwick; Geoffrey A. Gaines; Yong Su Kim; Andrew L. Walter; Byron Freelon; Antonello Tebano; Karsten Horn; Eli Rotenberg

doi:10.1103/PhysRevLett.111.126401

Layer-by-layer evolution of a two-dimensional electron gas near an oxide interface

Young Jun Chang, Luca Moreschini, Aaron Bostwick, Geoffrey A. Gaines, Yong Su Kim, Andrew L. Walter, Byron Freelon, Antonello Tebano, Karsten Horn, Eli Rotenberg

Department of Physics

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

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.

Original language	English
Article number	126401
Journal	Physical Review Letters
Volume	111
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.111.126401
State	Published - 18 Sep 2013

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10.1103/PhysRevLett.111.126401

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title = "Layer-by-layer evolution of a two-dimensional electron gas near an oxide interface",

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.",

author = "Chang, {Young Jun} and Luca Moreschini and Aaron Bostwick and Gaines, {Geoffrey A.} and Kim, {Yong Su} and Walter, {Andrew L.} and Byron Freelon and Antonello Tebano and Karsten Horn and Eli Rotenberg",

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AU - Chang, Young Jun

AU - Moreschini, Luca

AU - Bostwick, Aaron

AU - Gaines, Geoffrey A.

AU - Kim, Yong Su

AU - Walter, Andrew L.

AU - Freelon, Byron

AU - Tebano, Antonello

AU - Horn, Karsten

AU - Rotenberg, Eli

PY - 2013/9/18

Y1 - 2013/9/18

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevLett.111.126401

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VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

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ER -

Layer-by-layer evolution of a two-dimensional electron gas near an oxide interface

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