Nonthermal excitonic condensation near a spin-state transition
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Werner, Philipp
Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland
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Murakami, Yuta
Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
Published in:
- Physical Review B. - 2020, vol. 102, no. 2020-24, p. 241103
English
Recent experiments demonstrate the induction of long-range order in correlated electron systems via external perturbations, which calls for a better understanding of nonthermal ordered states and nonequilibrium symmetry breaking. Here, we reveal a mechanism based on entropy cooling and entropy trapping in a strongly correlated multiorbital system. We consider a two-orbital Hubbard model with Hund coupling and crystal-field splitting and show that in the vicinity of a spin-state transition, crystal-field quenches can induce an excitonic condensation at initial temperatures above the highest ordering temperature in equilibrium. We furthermore identify a dynamical phase transition in the evolution of the order parameter and show that such quenches can result in long-lived nonthermal excitonic condensates which have no analog in the equilibrium phase diagram.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/309124
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