Magnetic-field-dependent carrier injection at La2/3Sr1/3MnO3 and organic semiconductors interfaces -: art. no. 016802

被引：47

作者：

Wu, D ^{[1
]}

Xiong, ZH

Li, XG

Vardeny, ZV

Shi, J

机构：

[1] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[3] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.95.016802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have fabricated organic diodes utilizing several pi-conjugated organic semiconductors (OSEC) as spacer layers between La2/3Sr1/3MnO3 (LSMO) and various metallic electrodes, and measured their magnetoresistance (MR) and magnetoelectroluminescence (MEL) responses. The devices exhibit large negative high-field MR responses that resemble the MR response of the LSMO electrode, but amplified by similar to 3 orders in the resistance, and accompanied by a positive high-field MEL effect. These magnetic-field effects result from enhanced carrier injection at the LSMO-OSEC interface that is attributed to the anomalous field-dependent Fermi level shift in LSMO.

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页数：4

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共 13 条

[1] Organic light emitting diodes with spin polarized electrodes [J].

Arisi, E ;

Bergenti, I ;

Dediu, V ;

Loi, MA ;

Muccini, M ;

Murgia, M ;

Ruani, G ;

Taliani, C ;

Zamboni, R .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7682-7683

[2] Device model for single carrier organic diodes [J].

Davids, PS ;

Campbell, IH ;

Smith, DL .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (12) :6319-6325

[3] Large magnetic field effects in organic light emitting diodes based on tris(8-hydroxyquinoline aluminum) (Alq3)/IN,N′-Di(naphthalen-1-yl)-N,N′ diphenyl-benzidine (NPB) bilayers [J].

Davis, AH ;

Bussmann, K .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2004, 22 (04) :1885-1891

[4] Large magnetoresistance at room temperature in semiconducting polymer sandwich devices -: art. no. 185 [J].

Francis, TL ;

Mermer, Ö ;

Veeraraghavan, G ;

Wohlgenannt, M .

NEW JOURNAL OF PHYSICS, 2004, 6 :1-8

[5] Spin-polarized intergrain tunneling in La-2/Sr-3(1)/3MnO3 [J].

Hwang, HY ;

Cheong, SW ;

Ong, NP ;

Batlogg, B .

PHYSICAL REVIEW LETTERS, 1996, 77 (10) :2041-2044

[6] Magnetic field effects on organic electrophosphorescence [J].

Kalinowski, J ;

Cocchi, M ;

Virgili, D ;

Fattori, V ;

Di Marco, P .

PHYSICAL REVIEW B, 2004, 70 (20) :205303-1

[7] Large magnetoresistance at room-temperature in small-molecular-weight organic semiconductor sandwich devices [J].

Mermer, Ö ;

Veeraraghavan, G ;

Francis, TL ;

Wohlgenannt, M .

SOLID STATE COMMUNICATIONS, 2005, 134 (09) :631-636

[8] Dynamic Jahn-Teller effect and colossal magnetoresistance in La1-xSrxMnO3 [J].

Millis, AJ ;

Shraiman, BI ;

Mueller, R .

PHYSICAL REVIEW LETTERS, 1996, 77 (01) :175-178

[9] Hysteretic electroluminescence in organic light-emitting diodes for spin injection [J].

Salis, G ;

Alvarado, SF ;

Tschudy, M ;

Brunschwiler, T ;

Allenspach, R .

PHYSICAL REVIEW B, 2004, 70 (08) :085203-1

[10] Work function changes in the double layered manganite La1.2Sr1.8Mn2O7 -: art. no. 134428 [J].

Schulte, K ;

James, MA ;

Tjeng, LH ;

Steeneken, PG ;

Sawatzky, GA ;

Suryanarayanan, R ;

Dhalenne, G ;

Revcolevschi, A .

PHYSICAL REVIEW B, 2001, 64 (13)