Anisotropic Electronic Correlations in the Spin Density Wave State of La$_3$Ni$_2$O$_7$
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2026
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866918327620730880 |
|---|---|
| author | He, Ge Shen, Jun Xie, Shiyu Zhang, Haotian Huo, Mengwu Shu, Jun Hu, Deyuan Zhou, Xiaoxiang Zhang, Yanmin Qin, Lei Qiao, Liangxin Liu, Hengjie Hu, Chuansheng Dong, Xijie Wang, Dengjing Liu, Jun Hu, Wei Yuan, Jie Yan, Yajun Qi, Zeming Jin, Kui Du, Zengyi Wang, Meng Feng, Donglai |
| author_facet | He, Ge Shen, Jun Xie, Shiyu Zhang, Haotian Huo, Mengwu Shu, Jun Hu, Deyuan Zhou, Xiaoxiang Zhang, Yanmin Qin, Lei Qiao, Liangxin Liu, Hengjie Hu, Chuansheng Dong, Xijie Wang, Dengjing Liu, Jun Hu, Wei Yuan, Jie Yan, Yajun Qi, Zeming Jin, Kui Du, Zengyi Wang, Meng Feng, Donglai |
| contents | The bilayer nickelate superconductor La$_3$Ni$_2$O$_7$ undergoes a density wave transition near 150 K that has attracted intensive scrutiny, yet its microscopic origin remains elusive. Here we report polarization-resolved electronic Raman scattering measurements on high-quality single crystals of La$_3$Ni$_2$O$_7$. Below 150\,K, we observe a pronounced, symmetry-dependent redistribution of spectral weight in B$_{1g}$ and B$_{2g}$ channels, consistent with the formation of spin-density-wave (SDW) gaps. Quantitative analysis reveals momentum-selective SDW gap amplitudes, with intermediate-to-strong coupling near X/Y points of the Brillouin zone and weaker coupling along the diagonal direction, indicating an unconventional SDW driven by anisotropic electronic correlations. Our results establish the electronic character of the SDW in La$_3$Ni$_2$O$_7$, and provide a microscopic foundation for understanding the emergence of high-temperature superconductivity under pressure in nickelates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_07998 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropic Electronic Correlations in the Spin Density Wave State of La$_3$Ni$_2$O$_7$ He, Ge Shen, Jun Xie, Shiyu Zhang, Haotian Huo, Mengwu Shu, Jun Hu, Deyuan Zhou, Xiaoxiang Zhang, Yanmin Qin, Lei Qiao, Liangxin Liu, Hengjie Hu, Chuansheng Dong, Xijie Wang, Dengjing Liu, Jun Hu, Wei Yuan, Jie Yan, Yajun Qi, Zeming Jin, Kui Du, Zengyi Wang, Meng Feng, Donglai Superconductivity The bilayer nickelate superconductor La$_3$Ni$_2$O$_7$ undergoes a density wave transition near 150 K that has attracted intensive scrutiny, yet its microscopic origin remains elusive. Here we report polarization-resolved electronic Raman scattering measurements on high-quality single crystals of La$_3$Ni$_2$O$_7$. Below 150\,K, we observe a pronounced, symmetry-dependent redistribution of spectral weight in B$_{1g}$ and B$_{2g}$ channels, consistent with the formation of spin-density-wave (SDW) gaps. Quantitative analysis reveals momentum-selective SDW gap amplitudes, with intermediate-to-strong coupling near X/Y points of the Brillouin zone and weaker coupling along the diagonal direction, indicating an unconventional SDW driven by anisotropic electronic correlations. Our results establish the electronic character of the SDW in La$_3$Ni$_2$O$_7$, and provide a microscopic foundation for understanding the emergence of high-temperature superconductivity under pressure in nickelates. |
| title | Anisotropic Electronic Correlations in the Spin Density Wave State of La$_3$Ni$_2$O$_7$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2602.07998 |