Photoinduced excitonic magnetism in a multiorbital Hubbard system
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908821748711424 |
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| author | Geng, Lei Ray, Sujay Werner, Philipp |
| author_facet | Geng, Lei Ray, Sujay Werner, Philipp |
| contents | Multiorbital Hubbard models with Hund coupling and crystal-field splitting exhibit an instability toward spin-triplet excitonic order in the parameter regime characterized by strong local spin fluctuations. Upon chemical doping, two distinct types of excitonic ferromagnetism have been reported. Using steady-state nonequilibrium dynamical mean-field theory, we demonstrate that photo-doped half-filled systems can host nonthermal counterparts of these excitonic phases and exhibit a rich phase diagram in the space of photo-doping and crystal field splitting. Photo-doping a spin-triplet excitonic insulator provides a route towards nonequilibrium control of magnetic order. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_27483 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Photoinduced excitonic magnetism in a multiorbital Hubbard system Geng, Lei Ray, Sujay Werner, Philipp Strongly Correlated Electrons Multiorbital Hubbard models with Hund coupling and crystal-field splitting exhibit an instability toward spin-triplet excitonic order in the parameter regime characterized by strong local spin fluctuations. Upon chemical doping, two distinct types of excitonic ferromagnetism have been reported. Using steady-state nonequilibrium dynamical mean-field theory, we demonstrate that photo-doped half-filled systems can host nonthermal counterparts of these excitonic phases and exhibit a rich phase diagram in the space of photo-doping and crystal field splitting. Photo-doping a spin-triplet excitonic insulator provides a route towards nonequilibrium control of magnetic order. |
| title | Photoinduced excitonic magnetism in a multiorbital Hubbard system |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.27483 |