Spin-polarized two-dimensional electron gas at oxide interfaces

被引：51

作者：

Nanda, B. R. K. ^{[1
]}

Satpathy, S. ^{[1
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.101.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The possibility of formation of a fully spin-polarized 2D electron gas at the SrMnO3/(LaMnO3)(1)/SrMnO3 heterostructure is predicted from density-functional calculations. The La(d) electrons become confined in the direction normal to the interface in the electrostatic potential well of the positively charged layer of La atoms, acting as electron donors. These electrons mediate a ferromagnetic alignment of the Mn t(2g) spins near the interface via Zener double exchange and become, in turn, spin-polarized due to the internal magnetic fields of the Mn moments.

引用

页数：4

共 30 条

[1] EXPLICIT, 1ST-PRINCIPLES TIGHT-BINDING THEORY [J].

ANDERSEN, OK ;

JEPSEN, O .

PHYSICAL REVIEW LETTERS, 1984, 53 (27) :2571-2574

[2] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[3] EFFECTS OF DOUBLE EXCHANGE IN MAGNETIC CRYSTALS [J].

DEGENNES, PG .

PHYSICAL REVIEW, 1960, 118 (01) :141-154

[4] Joint superexchange -: Jahn-Teller mechanism for layered antiferromagnetism in LaMnO3 [J].

Feinberg, D ;

Germain, P ;

Grilli, M ;

Seibold, G .

PHYSICAL REVIEW B, 1998, 57 (10) :R5583-R5586

[5] Lattice-polarization effects on electron-gas charge densities in ionic superlattices [J].

Hamann, D. R. ;

Muller, D. A. ;

Hwang, H. Y. .

PHYSICAL REVIEW B, 2006, 73 (19)

[6] Two-subband-populated AlGaN/GaN heterostructures probed by electrically detected and microwave-modulated magnetotransport measurements [J].

Hang, D. R. ;

Huang, C. F. ;

Chen, Y. F. .

APPLIED PHYSICS LETTERS, 2006, 89 (09)

[7]

HUJIBEN M, 2006, NAT MATER, V5, P556

[8] SELF-CONSISTENT DIPOLE THEORY OF HETEROJUNCTION BAND OFFSETS [J].

LAMBRECHT, WRL ;

SEGALL, B ;

ANDERSEN, OK .

PHYSICAL REVIEW B, 1990, 41 (05) :2813-2831

[9] Lattice relaxation effects on the interface electron states in the perovskite oxide heterostructures:: LaTiO3 monolayer embedded in SrTiO3 [J].

Larson, P. ;

Popovic, Z. S. ;

Satpathy, S. .

PHYSICAL REVIEW B, 2008, 77 (24)

[10] Magneto-optical evidence of many-body effects in a spin-polarized two-dimensional electron gas [J].

Lemaître, A ;

Testelin, C ;

Rigaux, C ;

Wojtowicz, T ;

Karczewski, G .

PHYSICAL REVIEW B, 2000, 62 (08) :5059-5065

← 1 2 3 →