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

[1] Structure, stability, and electronic properties of SrTiO3/LaAlO3 and SrTiO3/SrRuO3 interfaces [J].

Albina, J. -M. ;

Mrovec, M. ;

Meyer, B. ;

Elsaesser, C. .

PHYSICAL REVIEW B, 2007, 76 (16)

[2] Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures [J].

Basletic, M. ;

Maurice, J. -L. ;

Carretero, C. ;

Herranz, G. ;

Copie, O. ;

Bibes, M. ;

Jacquet, E. ;

Bouzehouane, K. ;

Fusil, S. ;

Barthelemy, A. .

NATURE MATERIALS, 2008, 7 (08) :621-625

[3] IMPROVED TETRAHEDRON METHOD FOR BRILLOUIN-ZONE INTEGRATIONS [J].

BLOCHL, PE ;

JEPSEN, O ;

ANDERSEN, OK .

PHYSICAL REVIEW B, 1994, 49 (23) :16223-16233

[4] Magnetic effects at the interface between non-magnetic oxides [J].

Brinkman, A. ;

Huijben, M. ;

Van Zalk, M. ;

Huijben, J. ;

Zeitler, U. ;

Maan, J. C. ;

Van der Wiel, W. G. ;

Rijnders, G. ;

Blank, D. H. A. ;

Hilgenkamp, H. .

NATURE MATERIALS, 2007, 6 (07) :493-496

[5]

BUSCH G, 1968, Z ANGEW PHYSIK, V26, P1

[6] EINFLUSS DER MAGNETISCHEN ORDNUNG AUF DIE OPTISCHE ABSORPTION VON FERRO- ODER ANTIFERROMAGNETISCHEN HALBLEITERN [J].

BUSCH, G ;

WACHTER, P .

PHYSIK DER KONDENSITERTEN MATERIE, 1966, 5 (03) :232-+

[7] Oxide Nanoelectronics on Demand [J].

Cen, Cheng ;

Thiel, Stefan ;

Mannhart, Jochen ;

Levy, Jeremy .

SCIENCE, 2009, 323 (5917) :1026-1030

[8] Complexity in strongly correlated electronic systems [J].

Dagotto, E .

SCIENCE, 2005, 309 (5732) :257-262

[9] GROUND-STATES OF CONSTRAINED SYSTEMS - APPLICATION TO CERIUM IMPURITIES [J].

DEDERICHS, PH ;

BLUGEL, S ;

ZELLER, R ;

AKAI, H .

PHYSICAL REVIEW LETTERS, 1984, 53 (26) :2512-2515

[10] PHOTOEMISSION STUDIES OF ELECTRONIC STRUCTURE OF EUO, EUS, EUSE, AND GDS [J].

EASTMAN, DE ;

HOLTZBERG, F ;

METHFESSEL, S .

PHYSICAL REVIEW LETTERS, 1969, 23 (05) :226-+

← 1 2 3 4 5 →