Positive colossal magnetoresistance from interface effect in p-n junction of La0.9Sr0.1MnO3 and SrNb0.01Ti0.99O3 -: art. no. 184428

被引：151

作者：

Jin, KJ ^{[1
]}

Lu, HB ^{[1
]}

Zhou, QL ^{[1
]}

Zhao, K ^{[1
]}

Cheng, BL ^{[1
]}

Chen, ZH ^{[1
]}

Zhou, YL ^{[1
]}

Yang, GZ ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.71.184428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Different from the negative colossal magnetoresistance (CMR) of the LaMnO3 compound family, a positive CMR has been discovered at low applied magnetic field and high temperature in the epitaxial p-n heterostructure we fabricated with Sr-doped LaMnO3 and Nb-doped SrTiO3 by laser molecular-beam epitaxy. The mechanism causing the unusual positive CMR is proposed as a interface effect, i.e., the creation of a space charge region at the interface with different electron filling in bands comparing to that in the homogeneous region in Sr-doped LaMnO3. Other puzzling CMR features with bias voltage, temperature, and even composition are well explained by the present scenario.

引用

页数：6

共 30 条

[1] ELECTRON SPECTROSCOPIC INVESTIGATION OF THE SEMICONDUCTOR-METAL TRANSITION IN LA1-XSRXMNO3 [J].

CHAINANI, A ;

MATHEW, M ;

SARMA, DD .

PHYSICAL REVIEW B, 1993, 47 (23) :15397-15403

[2] Positive magnetoresistance from quantum interference effects in perovskite-type manganites [J].

Chen, P ;

Xing, DY ;

Du, YW .

PHYSICAL REVIEW B, 2001, 64 (10)

[3] SURFACE SPECTROSCOPY STUDIES OF THE SRTIO3 (100) SURFACE AND THE PLATINUM-SRTIO3 (100) INTERFACE [J].

CHUNG, YW ;

WEISSBARD, WB .

PHYSICAL REVIEW B, 1979, 20 (08) :3456-3461

[4] Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La0.65Sr0.35MnO3 [J].

Dulli, H ;

Dowben, PA ;

Liou, SH ;

Plummer, EW .

PHYSICAL REVIEW B, 2000, 62 (22) :14629-14632

[5] ELECTRONIC TRANSPORT IN STRONTIUM TITANATE [J].

FREDERIKSE, HPR ;

THURBER, WR ;

HOSLER, WR .

PHYSICAL REVIEW, 1964, 134 (2A) :A442-+

[6] DOPING-INDUCED CHANGES IN THE ELECTRONIC-STRUCTURE OF LAXSR1-XTIO3 - LIMITATION OF THE ONE-ELECTRON RIGID-BAND MODEL AND THE HUBBARD-MODEL [J].

FUJIMORI, A ;

HASE, I ;

NAKAMURA, M ;

NAMATAME, H ;

FUJISHIMA, Y ;

TOKURA, Y ;

ABBATE, M ;

DEGROOT, FMF ;

CZYZYK, MT ;

FUGGLE, JC ;

STREBEL, O ;

LOPEZ, F ;

DOMKE, M ;

KAINDL, G .

PHYSICAL REVIEW B, 1992, 46 (15) :9841-9844

[7] Microstructured magnetic tunnel junctions [J].

Gallagher, WJ ;

Parkin, SSP ;

Lu, Y ;

Bian, XP ;

Marley, A ;

Roche, KP ;

Altman, RA ;

Rishton, SA ;

Jahnes, C ;

Shaw, TM ;

Xiao, G .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :3741-3746

[8] Positive giant magnetoresistance in a Fe3O4/SrTiO3/La0.7Sr0.3MnO3 heterostructure [J].

Ghosh, K ;

Ogale, SB ;

Pai, SP ;

Robson, M ;

Li, E ;

Jin, I ;

Dong, ZW ;

Greene, RL ;

Ramesh, R ;

Venkatesan, T ;

Johnson, M .

APPLIED PHYSICS LETTERS, 1998, 73 (05) :689-691

[9] Optical properties of Nb doped SrTiO3 from first principles study [J].

Guo, XG ;

Chen, XS ;

Lu, W .

SOLID STATE COMMUNICATIONS, 2003, 126 (08) :441-446

[10] SURFACE DEFECTS AND ELECTRONIC-STRUCTURE OF SRTIO3 SURFACES [J].

HENRICH, VE ;

DRESSELHAUS, G ;

ZEIGER, HJ .

PHYSICAL REVIEW B, 1978, 17 (12) :4908-4921

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