標題: Domain Wall Conductivity in La-Doped BiFeO(3)
作者: Seidel, J.
Maksymovych, P.
Batra, Y.
Katan, A.
Yang, S. -Y.
He, Q.
Baddorf, A. P.
Kalinin, S. V.
Yang, C. -H.
Yang, J. -C.
Chu, Y. -H.
Salje, E. K. H.
Wormeester, H.
Salmeron, M.
Ramesh, R.
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 5-Nov-2010
摘要: The transport physics of domain wall conductivity in La-doped bismuth ferrite (BiFeO(3)) 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.
URI: http://dx.doi.org/10.1103/PhysRevLett.105.197603
http://hdl.handle.net/11536/31943
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.105.197603
期刊: PHYSICAL REVIEW LETTERS
Volume: 105
Issue: 19
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