Emergent quasi-particles of spin-1 trimer chain
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866918145266024448 |
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| author | Routh, Manodip Biswas, Anutosh Kumar, Manoranjan |
| author_facet | Routh, Manodip Biswas, Anutosh Kumar, Manoranjan |
| contents | The recent experimental realization of emergent quasi-particles, such as spinons, doublons, and quartons, in a spin-$1/2$ trimer chain has spurred new interest in low dimensional magnetic systems. In this study, we investigate the dynamical properties of the isotropic spin-$1$ trimer chain with intra and inter-trimer antiferromagnetic exchange couplings, ($J >0$ and $J' >0$), respectively, unveiling various quasi-particles: magnons, singletons, triplons, pentons, and heptons. For weak inter-trimer exchange coupling $J'/J \ll 1$, it behaves as an effective spin-$1$ chain with valence bond solid (VBS) ground state. Employing density matrix renormalization group (DMRG) techniques, we compute the dynamic structure factor (DSF) which reveals a gapped magnon band alongside weakly dispersive singleton, excited triplon, and penton excitations. The evolution of these excitations with inter-trimer coupling $J'$ is also examined, providing insight into the underlying excitation mechanisms. For spin-$1$ chain, these exotic quasi-particles eventually reduce to conventional magnon excitations as $J'/J \rightarrow 1$. Our results shed light on the rich and complex excitation spectrum of spin-$1$ trimer chains and offer unique perspectives on the dynamics in quantum spin systems. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_12565 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Emergent quasi-particles of spin-1 trimer chain Routh, Manodip Biswas, Anutosh Kumar, Manoranjan Strongly Correlated Electrons The recent experimental realization of emergent quasi-particles, such as spinons, doublons, and quartons, in a spin-$1/2$ trimer chain has spurred new interest in low dimensional magnetic systems. In this study, we investigate the dynamical properties of the isotropic spin-$1$ trimer chain with intra and inter-trimer antiferromagnetic exchange couplings, ($J >0$ and $J' >0$), respectively, unveiling various quasi-particles: magnons, singletons, triplons, pentons, and heptons. For weak inter-trimer exchange coupling $J'/J \ll 1$, it behaves as an effective spin-$1$ chain with valence bond solid (VBS) ground state. Employing density matrix renormalization group (DMRG) techniques, we compute the dynamic structure factor (DSF) which reveals a gapped magnon band alongside weakly dispersive singleton, excited triplon, and penton excitations. The evolution of these excitations with inter-trimer coupling $J'$ is also examined, providing insight into the underlying excitation mechanisms. For spin-$1$ chain, these exotic quasi-particles eventually reduce to conventional magnon excitations as $J'/J \rightarrow 1$. Our results shed light on the rich and complex excitation spectrum of spin-$1$ trimer chains and offer unique perspectives on the dynamics in quantum spin systems. |
| title | Emergent quasi-particles of spin-1 trimer chain |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.12565 |