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Theory of photoinduced ultrafast switching to a spin-orbital ordered hidden phase
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- Li, Jiajun (author)
- Department of Physics, University Erlangen-Nürnberg, Erlangen, Germany
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- Strand, Hugo, 1983- (author)
- Center for Computational Quantum Physics, Flatiron Institute, New York NY, USA; Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland; Department of Physics, University of Fribourg, Fribourg, Switzerland
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- Werner, Philipp (author)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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- 2018-11-02
- 2018
- English.
- In: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 9
- Journal article (peer-reviewed)
Abstract
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- Photo-induced hidden phases are often observed in materials with intertwined orders. Understanding the formation of these non-thermal phases is challenging and requires a resolution of the cooperative interplay between different orders on the ultra-short timescale. In this work, we demonstrate that non-equilibrium photo-excitations can induce a state with spin-orbital orders entirely different from the equilibrium state in the three-quarter-filled two-band Hubbard model. We identify a general mechanism governing the transition to the hidden state, which relies on a non-thermal partial melting of the intertwined orders mediated by photoinduced charge excitations in the presence of strong spin-orbital exchange interactions. Our study theoretically confirms the crucial role played by orbital degrees of freedom in the light-induced dynamics of strongly correlated materials and it shows that the switching to hidden states can be controlled already on the fs timescale of the electron dynamics.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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