Transient quantum isolation and critical behavior in the magnetization dynamics of half-metallic manganites

We combine time resolved pump-probe Magneto-Optical Kerr Effect and Photoelectron Spectroscopy experiments supported by theoretical analysis to determine the relaxation dynamics of delocalized electrons in half-metallic ferromagnetic manganite \(La_{1-x}Sr_{x}MnO_{3}\). We observe that the half-meta...

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Published in:arXiv.org 2019-06
Main Authors: Pincelli, Tommaso, Cucini, Riccardo, Verna, Adriano, Borgatti, Francesco, Oura, Masaki, Tamasaku, Kenji, Tien-lin, Lee, Schlueter, Christoph, Günther, Stefan, Christian Horst Back, Dell'Angela, Martina, Ciprian, Roberta, Orgiani, Pasquale, Petrov, Aleksandr, Sirotti, Fausto, Dediu, Valentin, Bergenti, Ilaria, Graziosi, Patrizio, Fabio Miletto Granozio, Tanaka, Yoshihito, Taguchi, Munetaka, Daimon, Hiroshi, Fujii, Jun, Rossi, Giorgio, Panaccione, Giancarlo
Format: Article
Language:English
Subjects:
Electron states
Ferromagnetism
Kerr magnetooptical effect
Magnetization
Manganese oxides
Manganites
Phase transitions
Photoelectron spectroscopy
Photoelectrons
Spectrum analysis
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Summary:We combine time resolved pump-probe Magneto-Optical Kerr Effect and Photoelectron Spectroscopy experiments supported by theoretical analysis to determine the relaxation dynamics of delocalized electrons in half-metallic ferromagnetic manganite \(La_{1-x}Sr_{x}MnO_{3}\). We observe that the half-metallic character of \(La_{1-x}Sr_{x}MnO_{3}\) determines the timescale of both the electronic phase transition and the quenching of magnetization, revealing a quantum isolation of the spin system in double exchange ferromagnets extending up to hundreds of picoseconds. We demonstrate the use of time-resolved hard X-ray photoelectron spectroscopy (TR-HAXPES) as a unique tool to single out the evolution of strongly correlated electronic states across a second-order phase transition in a complex material.
ISSN:2331-8422
DOI:10.48550/arxiv.1906.00257