Persistent quantum vibronic dynamics in a $5d^1$ double perovskite oxide
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2024
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| author | Iwahara, Naoya Soh, Jian-Rui Hirai, Daigorou Živković, Ivica Wei, Yuan Zhang, Wenliang Galdino, Carlos Yu, Tianlun Ishii, Kenji Pisani, Federico Malanyuk, Oleg Schmitt, Thorsten Rønnow, Henrik M |
| author_facet | Iwahara, Naoya Soh, Jian-Rui Hirai, Daigorou Živković, Ivica Wei, Yuan Zhang, Wenliang Galdino, Carlos Yu, Tianlun Ishii, Kenji Pisani, Federico Malanyuk, Oleg Schmitt, Thorsten Rønnow, Henrik M |
| contents | Quantum entanglement between the spin, orbital, and lattice degrees of freedom in condensed matter systems can emerge due to an interplay between spin-orbit and vibronic interactions. Heavy transition metal ions decorated on a face-centered cubic lattice, for example, in $5d^1$ double perovskites, are particularly suited to support these quantum entangled states, but direct evidence has not yet been presented. In this work, we report additional peaks in the low-energy spectra of a $5d^1$ double perovskite, Ba$_2$CaReO$_6$, which cannot be explained by adopting a purely classical description of lattice vibrations. Instead, our theoretical analysis demonstrates that these spectroscopic signatures are characteristic of orbital-lattice entangled states in Ba$_2$CaReO$_6$. Crucially, both theory and experiment demonstrate that these quantum-entangled states persist to low temperatures, despite the onset of multipolar order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_08095 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Persistent quantum vibronic dynamics in a $5d^1$ double perovskite oxide Iwahara, Naoya Soh, Jian-Rui Hirai, Daigorou Živković, Ivica Wei, Yuan Zhang, Wenliang Galdino, Carlos Yu, Tianlun Ishii, Kenji Pisani, Federico Malanyuk, Oleg Schmitt, Thorsten Rønnow, Henrik M Strongly Correlated Electrons Quantum entanglement between the spin, orbital, and lattice degrees of freedom in condensed matter systems can emerge due to an interplay between spin-orbit and vibronic interactions. Heavy transition metal ions decorated on a face-centered cubic lattice, for example, in $5d^1$ double perovskites, are particularly suited to support these quantum entangled states, but direct evidence has not yet been presented. In this work, we report additional peaks in the low-energy spectra of a $5d^1$ double perovskite, Ba$_2$CaReO$_6$, which cannot be explained by adopting a purely classical description of lattice vibrations. Instead, our theoretical analysis demonstrates that these spectroscopic signatures are characteristic of orbital-lattice entangled states in Ba$_2$CaReO$_6$. Crucially, both theory and experiment demonstrate that these quantum-entangled states persist to low temperatures, despite the onset of multipolar order. |
| title | Persistent quantum vibronic dynamics in a $5d^1$ double perovskite oxide |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.08095 |