Transport signatures of percolation and electronic phase homogeneity in La1-x Srx CoO3 single crystals

C. He; S. El-Khatib; S. Eisenberg; M. Manno; J. W. Lynn; H. Zheng; J. F. Mitchell; C. Leighton

doi:10.1063/1.3269192

Transport signatures of percolation and electronic phase homogeneity in La_1-x Sr_x CoO₃ single crystals

C. He, S. El-Khatib, S. Eisenberg, M. Manno, J. W. Lynn, H. Zheng, J. F. Mitchell, C. Leighton

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La_1-x Sr_x CoO₃ 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 La_1-x Sr_x CoO₃ can be thoroughly understood based on our current understanding of the phase-separated state.

Original language	English (US)
Article number	222511
Journal	Applied Physics Letters
Volume	95
Issue number	22
DOIs	https://doi.org/10.1063/1.3269192
State	Published - 2009

Bibliographical note

Funding Information:
Work at UMN supported by DoE (Grant No. DE-FG02-06ER46275, for neutron scattering), NSF (Grant No. DMR-0804432), and Dept. of Commerce. Work at ANL supported by DoE under Grant No. DE-AC02-06CH11357.

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10.1063/1.3269192

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title = "Transport signatures of percolation and electronic phase homogeneity in La1-x Srx CoO3 single crystals",

abstract = "The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La1-x Srx CoO3 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-x Srx CoO3 can be thoroughly understood based on our current understanding of the phase-separated state.",

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T1 - Transport signatures of percolation and electronic phase homogeneity in La1-x Srx CoO3 single crystals

AU - He, C.

AU - El-Khatib, S.

AU - Eisenberg, S.

AU - Manno, M.

AU - Lynn, J. W.

AU - Zheng, H.

AU - Mitchell, J. F.

AU - Leighton, C.

N1 - Funding Information: Work at UMN supported by DoE (Grant No. DE-FG02-06ER46275, for neutron scattering), NSF (Grant No. DMR-0804432), and Dept. of Commerce. Work at ANL supported by DoE under Grant No. DE-AC02-06CH11357.

PY - 2009

Y1 - 2009

N2 - The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La1-x Srx CoO3 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-x Srx CoO3 can be thoroughly understood based on our current understanding of the phase-separated state.

AB - The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La1-x Srx CoO3 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-x Srx CoO3 can be thoroughly understood based on our current understanding of the phase-separated state.

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