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$Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$$

Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$

by Luetkens, Hubertus , Medvedev, Sergey , Khasanov, Rustem , Guguchia, Zurab , Hicken, Thomas J , Pomjakushina, Ekaterina , Shi, Lifen , Plokhikh, Igor , Gawryluk, Dariusz J , Klimczuk, Tomasz , Medarde, Marisa , Schneieder, Christof W , Sazgari, Vahid , Ma, KeYuan

in Atomic properties / Electron phonon interactions / Isotope effect / Lattice vibration / Oxygen isotopes / Phonons / Spin density waves / Substitutes / Transition temperature

2026

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Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$

in Atomic properties / Electron phonon interactions / Isotope effect / Lattice vibration / Oxygen isotopes / Phonons / Spin density waves / Substitutes / Transition temperature

2026

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$Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$$

Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$

in Atomic properties / Electron phonon interactions / Isotope effect / Lattice vibration / Oxygen isotopes / Phonons / Spin density waves / Substitutes / Transition temperature

2026

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$Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$$

Paper

Oxygen-isotope effect on density wave transitions in La\$_3\$Ni\$_2\$O\$_7\$

Luetkens, Hubertus,

Medvedev, Sergey,

Khasanov, Rustem,

Guguchia, Zurab,

Hicken, Thomas J,

Pomjakushina, Ekaterina,

Shi, Lifen,

Plokhikh, Igor,

Gawryluk, Dariusz J,

Klimczuk, Tomasz,

Medarde, Marisa,

Schneieder, Christof W,

Sazgari, Vahid,

Ma, KeYuan

2026

Overview

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 O \\; ^18 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_ 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.

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Publisher

Cornell University Library, arXiv.org

Subject

Atomic properties

/ Electron phonon interactions

/ Phonons