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

Academic Article

Abstract

  • 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.
  • Authors

    Published In

  • Phys. Rev. B  Journal
  • Keywords

  • cond-mat.str-el, cond-mat.str-el, cond-mat.mtrl-sci
  • Digital Object Identifier (doi)

    Author List

  • Li T; Patz A; Lingos P; Mouchliadis L; Li L; Yan J; Perakis IE; Wang J
  • Start Page

  • 224432
  • Volume

  • 95