Polaron Coherence Condensation As the Mechanism for Colossal Magnetoresistance in Layered Manganites | Zendy

N. Mannella | Zendy; Wanli Yang | Zendy; Kiyohisa Tanaka | Zendy; X. J. Zhou | Zendy; Hao Zheng | Zendy; J. F. Mitchell | Zendy; Jan Zaanen | Zendy; T. P. Devereaux | Zendy; Naoto Nagaosa | Zendy; Z. Hussain | Zendy; ZhiXun Shen | Zendy

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Polaron Coherence Condensation As the Mechanism for Colossal Magnetoresistance in Layered Manganites

Author(s) -

N. Mannella,

Wanli Yang,

Kiyohisa Tanaka,

X. J. Zhou,

Hao Zheng,

J. F. Mitchell,

Jan Zaanen,

T. P. Devereaux,

Naoto Nagaosa,

Z. Hussain,

ZhiXun Shen

Publication year - 2007

Language(s) - English

Resource type - Reports

DOI - 10.2172/920014

Subject(s) - polaron , colossal magnetoresistance , manganite , condensed matter physics , magnetoresistance , curie temperature , quasiparticle , materials science , electrical resistivity and conductivity , metal–insulator transition , ferromagnetism , metal , physics , electron , superconductivity , quantum mechanics , magnetic field , metallurgy

Angle-resolved photoemission spectroscopy data for the bilayer manganite La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} show that, upon lowering the temperature below the Curie point, a coherent polaronic metallic groundstate emerges very rapidly with well defined quasiparticles which track remarkably well the electrical conductivity, consistent with macroscopic transport properties. Our data suggest that the mechanism leading to the insulator-to-metal transition in La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} can be regarded as a polaron coherence condensation process acting in concert with the Double Exchange interaction

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