TITLE

Transport signatures of percolation and electronic phase homogeneity in La1-xSrxCoO3 single crystals

AUTHOR(S)
He, C.; El-Khatib, S.; Eisenberg, S.; Manno, M.; Lynn, J. W.; Zheng, H.; Mitchell, J. F.; Leighton, C.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p222511
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La1-xSrxCoO3 crystals is reported. It is demonstrated; (i) that the T=0 metal-insulator transition can be quantitatively understood using double exchange-modified percolation theory, and, (ii) that the onset of a phase-pure low T ferromagnetic state at high x has a profound effect on the high T transport due to a crossover in the nature of the spin fluctuations. It is concluded that many features of the transport in La1-xSrxCoO3 can be thoroughly understood based on our current understanding of the phase-separated state.
ACCESSION #
45610515

 

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