Oxygen-isotope effect on density wave transitions in La$_3$Ni$_2$O$_{7}$
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2025
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| author | Khasanov, Rustem Sazgari, Vahid Plokhikh, Igor Shi, Lifen Ma, KeYuan Medarde, Marisa Pomjakushina, Ekaterina Klimczuk, Tomasz Hicken, Thomas J. Luetkens, Hubertus Schneieder, Christof W. Guguchia, Zurab Medvedev, Sergey Gawryluk, Dariusz J. |
| author_facet | Khasanov, Rustem Sazgari, Vahid Plokhikh, Igor Shi, Lifen Ma, KeYuan Medarde, Marisa Pomjakushina, Ekaterina Klimczuk, Tomasz Hicken, Thomas J. Luetkens, Hubertus Schneieder, Christof W. Guguchia, Zurab Medvedev, Sergey Gawryluk, Dariusz J. |
| contents | TThe isotope effect is a powerful probe of electron-phonon interactions in solid-state systems, offering key insights into how atomic mass influences emergent quantum states. Here, the impact of oxygen isotope substitution ($^{16}{\rm O}\rightarrow \; ^{18}{\rm O}$) on charge- and spin-density wave (CDW and SDW) transitions in the double-layer Ruddlesden-Popper nickelate La$_3$Ni$_2$O$_7$ is investigated. A clear isotope effect is observed in the CDW transition: the transition temperature ($T_{\rm CDW}$) increases upon $^{18}$O substitution. In contrast, the SDW transition temperature remains unaffected within experimental uncertainty. These findings point to a strong involvement of lattice vibrations in the formation of charge order, while spin order appears to be predominantly of electronic origin. The results suggest that electron-phonon coupling, manifested through the CDW response to isotope substitution, may be relevant to the superconducting pairing mechanism in Ruddlesden-Popper nickelates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_08290 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Oxygen-isotope effect on density wave transitions in La$_3$Ni$_2$O$_{7}$ Khasanov, Rustem Sazgari, Vahid Plokhikh, Igor Shi, Lifen Ma, KeYuan Medarde, Marisa Pomjakushina, Ekaterina Klimczuk, Tomasz Hicken, Thomas J. Luetkens, Hubertus Schneieder, Christof W. Guguchia, Zurab Medvedev, Sergey Gawryluk, Dariusz J. Superconductivity Strongly Correlated Electrons TThe isotope effect is a powerful probe of electron-phonon interactions in solid-state systems, offering key insights into how atomic mass influences emergent quantum states. Here, the impact of oxygen isotope substitution ($^{16}{\rm O}\rightarrow \; ^{18}{\rm O}$) on charge- and spin-density wave (CDW and SDW) transitions in the double-layer Ruddlesden-Popper nickelate La$_3$Ni$_2$O$_7$ is investigated. A clear isotope effect is observed in the CDW transition: the transition temperature ($T_{\rm CDW}$) increases upon $^{18}$O substitution. In contrast, the SDW transition temperature remains unaffected within experimental uncertainty. These findings point to a strong involvement of lattice vibrations in the formation of charge order, while spin order appears to be predominantly of electronic origin. The results suggest that electron-phonon coupling, manifested through the CDW response to isotope substitution, may be relevant to the superconducting pairing mechanism in Ruddlesden-Popper nickelates. |
| title | Oxygen-isotope effect on density wave transitions in La$_3$Ni$_2$O$_{7}$ |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.08290 |