Transport signatures of percolation and electronic phase homogeneity in La{sub 1-x}Sr{sub x}CoO{sub 3} single crystals.

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Appl. Phys. Lett.

DOI:https://doi.org/10.1063/1.3269192· OSTI ID:970799

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

The influence of nanoscopic magnetoelectronic phase separation on electrical transport in La{sub 1-x}Sr{sub x}CoO{sub 3} 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{sub 1-x}Sr{sub x}CoO{sub 3} can be thoroughly understood based on our current understanding of the phase-separated state.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 970799
• Report Number(s): ANL/MSD/JA-65855; APPLAB; TRN: US201003%%134
• Journal Information: Appl. Phys. Lett., Vol. 95, Issue 2009; ISSN 0003-6951
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FLUCTUATIONS
MONOCRYSTALS
SPIN
TRANSPORT