Correlating Quasi-Electron Relaxation with Quantum Femtosecond Magnetism in the Order Parameter Dynamics of Insulating Manganites

Autor:	Li, T., Patz, A., Lingos, P., Mouchliadis, L., Li, L., Yan, J., Perakis, I. E., Wang, J.
Rok vydání:	2014
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Zdroj:	Phys. Rev. B 95, 224432 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.95.224432
Popis:	Femtosecond (fs)-resolved simultaneous measurements of charge and spin dynamics reveal the coexistence of two different quasi-particle excitations in colossal magneto-resistive (CMR) manganites, with {\em fs} and {\em ps} relaxation times respectively. Their populations reverse size above a {\em photoexcitation-intensity-threshold} coinciding with a "sudden" antiferro-to-ferromagnetic switching during $<$100 fs laser pulses. We present evidence that fast, metallic, mobile quasi--electrons dressed by {\em quantum spin fluctuations} coexist with slow, localized, polaronic charge carriers in non-equilibrium phases. This may be central to CMR transition and leads to a laser-driven charge reorganization simultaneously with quantum fs magnetism via an emergent quantum-spin/charge/lattice transient coupling. Comment: main text plus supplementary
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1409.1591 Zobrazit plný text záznamu View this record from Arxiv