Prediction of a spin-polarized two-dimensional electron gas at the LaAlO3/EuO(001) interface

被引：46

作者：

Wang, Yong ^{[1
]}

Niranjan, Manish K. ^{[1
]}

Burton, J. D. ^{[1
]}

An, Joonhee M. ^{[1
]}

Belashchenko, Kirill D. ^{[1
]}

Tsymbal, Evgeny Y. ^{[1
]}

机构：

[1] Univ Nebraska, Dept Phys & Astron, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 21期

基金：

美国国家科学基金会;

关键词：

ab initio calculations; conduction bands; Curie temperature; doping; europium compounds; exchange interactions (electron); ferromagnetic materials; lanthanum compounds; magnetoelectronics; spin polarised transport; two-dimensional electron gas; EUO;

D O I：

10.1103/PhysRevB.79.212408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

First-principles calculations predict the existence of a spin-polarized two-dimensional electron gas (2DEG) at the LaO/EuO interface in a LaAlO3/EuO(001) heterostructure. This polar interface favors electron doping into the Eu-5d conduction bands resulting in a 2DEG formed at the interface. Due to the exchange splitting of the Eu-5d states, the 2DEG is spin polarized below the Curie temperature of EuO. The predicted mechanism for the formation of a spin-polarized 2DEG at the interface between polar and ferromagnetic insulators may provide a robust magnetism of the 2DEG which is interesting for spintronics applications.

引用

页数：4

共 44 条

[11] High mobility in LaAlO3/SrTiO3 heterostructures:: Origin, dimensionality, and perspectives [J].

Herranz, G. ;

Basletic, M. ;

Bibes, M. ;

Carretero, C. ;

Tafra, E. ;

Jacquet, E. ;

Bouzehouane, K. ;

Deranlot, C. ;

Hamzic, A. ;

Broto, J.-M. ;

Barthelemy, A. ;

Fert, A. .

PHYSICAL REVIEW LETTERS, 2007, 98 (21)

[12] INHOMOGENEOUS ELECTRON-GAS [J].

RAJAGOPAL, AK ;

CALLAWAY, J .

PHYSICAL REVIEW B, 1973, 7 (05) :1912-1919

[13] Polar discontinuity doping of the LaVO3/SrTiO3 interface [J].

Hotta, Y. ;

Susaki, T. ;

Hwang, H. Y. .

PHYSICAL REVIEW LETTERS, 2007, 99 (23)

[14] Analysis of Screening Mechanisms for Polar Discontinuity for LaAlO3/SrTiO3 Thin Films Based on Ab initio Calculations [J].

Ishibashi, Shoji ;

Terakura, Kiyoyuki .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (10)

[15] Magnetism of LaAlO3/SrTiO3 superlattices [J].

Janicka, Karolina ;

Velev, Julian P. ;

Tsymbal, Evgeny Y. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (07)

[16] Quantum Nature of Two-Dimensional Electron Gas Confinement at LaAlO3/SrTiO3 Interfaces [J].

Janicka, Karolina ;

Velev, Julian P. ;

Tsymbal, Evgeny Y. .

PHYSICAL REVIEW LETTERS, 2009, 102 (10)

[17] Effect of oxygen vacancies in the SrTiO3 substrate on the electrical properties of the LaAlO3/SrTiO3 interface [J].

Kalabukhov, Alexey ;

Gunnarsson, Robert ;

Borjesson, Johan ;

Olsson, Eva ;

Claeson, Tord ;

Winkler, Dag .

PHYSICAL REVIEW B, 2007, 75 (12)

[18] SELF-CONSISTENT EQUATIONS INCLUDING EXCHANGE AND CORRELATION EFFECTS [J].

KOHN, W ;

SHAM, LJ .

PHYSICAL REVIEW, 1965, 140 (4A) :1133-&

[19] Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186

[20] Charge origin and localization at the n-type SrTiO3/LaAlO3 interface [J].

Lee, Jaekwang ;

Demkov, Alexander A. .

PHYSICAL REVIEW B, 2008, 78 (19)

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