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

Abstract

Angle-resolved photoemission spectroscopy data for the bilayer manganite La1.2Sr1.8Mn2O7 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 La1.2Sr1.8Mn2O7 can be regarded as a polaron coherence condensation process acting in concert with the Double Exchange interaction.

arXiv comment4 pages, 3 figures, in press

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Cited by in corpus (21)

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• Determinant quantum Monte Carlo study of the two-dimensional single-band Hubbard-Holstein model
• Measurement of Coherent Polarons in the Strongly Coupled Antiferromagnetically Ordered Iron-Chalcogenide Fe1.02Te using Angle-Resolved Photoemission Spectroscopy
• Observation of anomalous temperature dependence of spectrum on small Fermi surfaces in a BiS2-based superconductor
• Bilayer manganites: polarons in the midst of a metallic breakdown
• Tunable Bi-frustrated Electron Spin and Charge States in a Cu-Hexaaminobenzene Framework
• Electron-lattice coupling and partial nesting as the origin of Fermi-Arcs in manganites
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• Empirical relationship between x-ray photoemission spectra and electrical conductivity in a colossal magnetoresistive manganite La_{1-x}Sr_{x}MnO_{3}
• Orbital mixing and nesting in the bilayer manganites La${}_{2-2x}$Sr${}_{1+2x}$Mn${}_2$O${}_7$
• Mesoscopic transport in ultrathin films of La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$
• Low temperature dynamic polaron liquid in a manganite exhibiting colossal magnetoresistance
• A high resolution, hard x-ray photoemission investigation of La_(2-2x)Sr_(1+2x)Mn_2O_7 (0.30<x<0.50): on microscopic phase separation and the surface electronic structure of a bilayered CMR manganite
• Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance
• Signatures of electronic polarons in La${}_{1-x}$Sr${}_{1+x}$MnO${}_4$ observed by electron energy-loss spectroscopy
• Non-rigid band shift and non-monotonic electronic structure changes upon doping in the normal state of the pnictide high temperature superconductor Ba2(Fe1-xCox)2As2
• Electronic confinement and ordering instabilities in colossal magnetoresistive bilayer manganites
• Band-selective Plasmonic Polaron in Thermoelectric Semimetal Ta${}_2$PdSe${}_6$ with ultra-high power factor