Anisotropic Spin Stripe Domains in Bilayer La$_3$Ni$_2$O$_7$
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arXiv
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Gupta, N. K Gong, R. Wu, Y. Kang, M. Parzyck, C. T. Gregory, B. Z. Costa, N. Sutarto, R. Sarker, S. Singer, A. Schlom, D. G. Shen, K. M. Hawthorn, D. G. |
| author_facet | Gupta, N. K Gong, R. Wu, Y. Kang, M. Parzyck, C. T. Gregory, B. Z. Costa, N. Sutarto, R. Sarker, S. Singer, A. Schlom, D. G. Shen, K. M. Hawthorn, D. G. |
| contents | The discovery of superconductivity in La$_3$Ni$_2$O$_7$ under pressure has motivated the investigation of a parent spin density wave (SDW) state, which could provide the underlying pairing interaction. Here, we employ resonant soft x-ray scattering and polarimetry on thin films of bilayer La$_3$Ni$_2$O$_7$ to determine that the magnetic structure of the SDW forms unidirectional diagonal spin stripes with moments lying within the NiO$_2$ plane and perpendicular to $\mathbf{Q}_{SDW}$, but without evidence of the strong charge disproportionation typically associated with other nickelates. These stripes form anisotropic domains with shorter correlation lengths perpendicular versus parallel to $\mathbf{Q}_{SDW}$, revealing nanoscale rotational and translational symmetry breaking analogous to the cuprate and Fe-based superconductors, with possible Bloch-like antiferromagnetic domain walls separating orthogonal domains. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03210 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anisotropic Spin Stripe Domains in Bilayer La$_3$Ni$_2$O$_7$ Gupta, N. K Gong, R. Wu, Y. Kang, M. Parzyck, C. T. Gregory, B. Z. Costa, N. Sutarto, R. Sarker, S. Singer, A. Schlom, D. G. Shen, K. M. Hawthorn, D. G. Superconductivity Strongly Correlated Electrons The discovery of superconductivity in La$_3$Ni$_2$O$_7$ under pressure has motivated the investigation of a parent spin density wave (SDW) state, which could provide the underlying pairing interaction. Here, we employ resonant soft x-ray scattering and polarimetry on thin films of bilayer La$_3$Ni$_2$O$_7$ to determine that the magnetic structure of the SDW forms unidirectional diagonal spin stripes with moments lying within the NiO$_2$ plane and perpendicular to $\mathbf{Q}_{SDW}$, but without evidence of the strong charge disproportionation typically associated with other nickelates. These stripes form anisotropic domains with shorter correlation lengths perpendicular versus parallel to $\mathbf{Q}_{SDW}$, revealing nanoscale rotational and translational symmetry breaking analogous to the cuprate and Fe-based superconductors, with possible Bloch-like antiferromagnetic domain walls separating orthogonal domains. |
| title | Anisotropic Spin Stripe Domains in Bilayer La$_3$Ni$_2$O$_7$ |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.03210 |