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- W3045796982 abstract "Optically induced phase transitions of the manganite ${mathrm{Pr}}_{1/3}{mathrm{Ca}}_{2/3}mathrm{Mn}{mathrm{O}}_{3}$ have been simulated by using a model Hamiltonian that captures the dynamics of strongly correlated charge, orbital, lattice, and spin degrees of freedom. Its parameters have been extracted from first-principles calculations. Beyond a critical intensity of a femtosecond light pulse, the material undergoes an ultrafast and nonthermal magnetic phase transition from a noncollinear to collinear antiferromagnetic phase. The light-pulse excites selectively either a spin-nematic or a ferroelectric phase, depending on the light polarization. The behavior can be traced to an optically induced ferromagnetic coupling between Mn trimers, i.e., polarons which are delocalized over three Mn sites. The polarization guides the polymerization of the polaronic crystal into distinct patterns of ferromagnetic chains determining the target phase." @default.
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- W3045796982 date "2020-11-18" @default.
- W3045796982 modified "2023-10-02" @default.
- W3045796982 title "Ultrafast spin-nematic and ferroelectric phase transitions induced by femtosecond light pulses" @default.
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- W3045796982 doi "https://doi.org/10.1103/physrevb.102.174430" @default.
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