Domain Wall Conductivity in La-Doped BiFeO3

被引：356

作者：

Seidel, J. ^{[1
,2
]}

Maksymovych, P. ^{[3
]}

Batra, Y. ^{[4
]}

Katan, A. ^{[2
]}

Yang, S. -Y. ^{[5
]}

He, Q. ^{[1
]}

Baddorf, A. P. ^{[3
]}

Kalinin, S. V. ^{[3
]}

Yang, C. -H. ^{[6
]}

Yang, J. -C. ^{[7
]}

Chu, Y. -H. ^{[7
]}

Salje, E. K. H. ^{[8
,9
]}

Wormeester, H. ^{[4
]}

Salmeron, M. ^{[2
]}

Ramesh, R. ^{[1
,2
,5
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[4] Univ Twente, MESA Res Inst, NL-7500 AE Enschede, Netherlands

[5] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[6] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[7] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

[8] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

[9] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 19期

关键词：

FERROELECTRIC-FILMS; BULK;

D O I：

10.1103/PhysRevLett.105.197603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The transport physics of domain wall conductivity in La-doped bismuth ferrite (BiFeO3) has been probed using variable temperature conducting atomic force microscopy and piezoresponse force microscopy in samples with arrays of domain walls in the as-grown state. Nanoscale current measurements are investigated as a function of bias and temperature and are shown to be consistent with distinct electronic properties at the domain walls leading to changes in the observed local conductivity. Our observation is well described within a band picture of the observed electronic conduction. Finally, we demonstrate an additional degree of control of the wall conductivity through chemical doping with oxygen vacancies, thus influencing the local conductive state.

引用

页数：3

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