Self-organized magnon condensation in quasi-one-dimensional edge-shared cuprates
| Autor: | Agrapidis, Cliò Efthimia, Drechsler, Stefan-Ludwig, Nishimoto, Satoshi |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Understanding the dynamics of magnons in quantum magnetism is a captivating area of condensed matter physics. Magnons exhibit unique collective behaviours, including the formation of multimagnon bound states (MBSs). Predicted by Bethe over 90 years ago, MBSs in one-dimensional (1D) quantum magnets remain a significant subject of study due to their fundamental and technological implications. While recent advancements in quantum simulation with ultracold atoms have enabled the observation of MBSs in optical lattices, observing these states in naturally occurring materials presents an even more exciting prospect. This study proposes a novel mechanism for the stabilisation of MBSs in quasi-1D (Q1D) edge-shared cuprates, materials known for their complex magnetic interactions. Contrary to conventional approaches that require high external magnetic fields, our mechanism leverages small antiferromagnetic (AFM) interchain couplings, which act analogously to an internal magnetic field. These couplings induce collinear AFM order within individual chains, facilitating the formation of stable MBSs. This self-organised magnon condensation driven by interchain interactions is experimentally more accessible and opens new avenues for observations. Our findings offer a fresh perspective on magnetic ordered states driven by interchain-coupling-induced internal magnetic fields. We provide a comprehensive theoretical framework, present numerical results compared with experimental data from specific Q1D cuprates like Li$_2$CuO$_2$, Ca$_2$Y$_2$Cu$_5$O$_{10}$, LiCuSbO$_4$, and PbCuSO$_4$(OH)$_2$, and discuss the broader implications of our discoveries. This work paves the way for future research exploring the potential of interchain coupling-driven magnon condensation, significantly advancing the fields of quantum computing, spintronics, and magnonics. Comment: 20 pages, 5 figues, Supplementary information |
| Databáze: | arXiv |
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