Werner, Philipp Murakami, Yuta 2020-12-04 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. application/pdf https://folia.unifr.ch/global/documents/309124 https://folia.unifr.ch/documents/309124/files/wer_nec.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.102.241103 info:eu-repo/semantics/openAccess License undefined Physical Review B. - 2020, vol. 102, no. 2020-24, p. 241103 Dynamical phase transitions Excitons Strongly correlated systems Hubbard model info:eu-repo/classification/udc/53 Nonthermal excitonic condensation near a spin-state transition http://purl.org/coar/resource_type/c_6501