Half-metallicity at the (110) interface between a full Heusler alloy and GaAs

被引：60

作者：

Nagao, K ^{[1
]}

Miura, Y ^{[1
]}

Shirai, M ^{[1
]}

机构：

[1] Tohoku Univ, Elect Commun Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.73.104447

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic properties of Co2CrAl/GaAs interfaces are investigated by using first-principles calculations with density functional theory. It is found that spin polarization tends to remain relatively high at the (110) interface and reaches almost unity for a specific (110) interfacial structure. Furthermore, the nearly-half-metallic interface turns out to be the most stable of the (110) interfacial structures studied here. Spin polarization calculated only from the sp-projected density of states is also examined in order to eliminate the effects stemming from the localized d components. The analysis shows that the high spin polarization at the (110) interface owes little to the localized d component and, therefore, is expected to be fairly relevant to transport properties. Co2CrSi/GaAs, Co2MnSi/GaAs, and Co2MnGe/GaAs heterostructures are also investigated, and similar half-metal-like behavior at (110) interface is observed for all of them.

引用

页数：7

共 45 条

[1] Material design of half-metallic zinc-blende CrAs and the synthesis by molecular-beam epitaxy [J].

Akinaga, H ;

Manago, T ;

Shirai, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2000, 39 (11B) :L1118-L1120

[2] Theoretical study of the electronic and magnetic structures of the Heusler alloys Co2Cr1-xFexAl -: art. no. 054441 [J].

Antonov, VN ;

Dürr, HA ;

Kucherenko, Y ;

Bekenov, LV ;

Yaresko, AN .

PHYSICAL REVIEW B, 2005, 72 (05)

[3] First-principles calculations of the ideal cleavage energy of bulk niobium(111)/α-alumina(0001) interfaces [J].

Batirev, IG ;

Alavi, A ;

Finnis, MW ;

Deutsch, T .

PHYSICAL REVIEW LETTERS, 1999, 82 (07) :1510-1513

[4] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[5] Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments [J].

Bowen, M ;

Bibes, M ;

Barthélémy, A ;

Contour, JP ;

Anane, A ;

Lemaitre, Y ;

Fert, A .

APPLIED PHYSICS LETTERS, 2003, 82 (02) :233-235

[6] MAGNETIC AND MAGNETO-OPTICAL PROPERTIES OF HEUSLER ALLOYS BASED ON ALUMINUM AND GALLIUM [J].

BUSCHOW, KHJ ;

VANENGEN, PG .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1981, 25 (01) :90-96

[7] Towards 100% spin-polarized charge-injection: The half-metallic NiMnSb/CdS interface [J].

de Wijs, GA ;

de Groot, RA .

PHYSICAL REVIEW B, 2001, 64 (02)

[8] NEW CLASS OF MATERIALS - HALF-METALLIC FERROMAGNETS [J].

DEGROOT, RA ;

MUELLER, FM ;

VANENGEN, PG ;

BUSCHOW, KHJ .

PHYSICAL REVIEW LETTERS, 1983, 50 (25) :2024-2027

[9] Element-specific magnetic moments from core-absorption magnetic circular dichroism of the doped Heusler alloy Co2Cr0.6Fe0.4Al -: art. no. 104412 [J].

Elmers, HJ ;

Fecher, GH ;

Valdaitsev, D ;

Nepijko, SA ;

Gloskovskii, A ;

Jakob, G ;

Schönhense, G ;

Wurmehl, S ;

Block, T ;

Felser, C ;

Hsu, PC ;

Tsai, WL ;

Cramm, S .

PHYSICAL REVIEW B, 2003, 67 (10) :8

[10] Interface properties of NiMnSb/InP and NiMnSb/GaAs contacts -: art. no. 214431 [J].

Galanakis, I ;

Lezaic, M ;

Bihlmayer, G ;

Blügel, S .

PHYSICAL REVIEW B, 2005, 71 (21)

← 1 2 3 4 5 →