2026-04-17 合肥物質科学研究院（HFIPS）
Phase diagram of the superconducting upper critical field of trilayer nickelate La4Ni3O10-δ along two orientations under high magnetic field (Image by BIAN Yaolong)
＜関連情報＞
- https://english.hf.cas.cn/nr/rn/202604/t20260417_1157499.html
- https://journals.aps.org/prx/abstract/10.1103/h5sv-dzd1
加圧下にある三層構造ニッケレートLa4Ni3O10−におけるほぼ等方性の上限臨界磁場 Nearly Isotropic Upper Critical Field in Pressurized Trilayer Nickelate La4Ni3O10−
Di Peng, Yaolong Bian, Zhenfang Xing, Lixing Chen, Jiaqiang Cai, Tao Luo, Fujun Lan, Yuxin Liu, Yinghao Zhu
Physical Review X Published: 8 April, 2026
DOI: https://doi.org/10.1103/h5sv-dzd1
Abstract
Evidence of superconductivity has recently been reported in pressurized nickelates, providing a new platform to explore high-temperature superconductivity. However, detailed experimental characterization of the superconducting properties of nickelates under pressure remains limited and technically challenging. Here, we report the first full temperature-dependent measurements of the upper critical field (02) in pressurized trilayer nickelate La4Ni3O10− single crystal, achieved by integrating advanced high-magnetic-field and high-pressure techniques. Remarkably, La4Ni3O10− exhibits nearly isotropic superconductivity, with the anisotropic parameter decreasing monotonically from 1.4 near to 1 at lower temperatures. By applying a two-band model analysis out of plane and in plane 02, we uncover a compensation of anisotropic diffusivity between bands primarily originating from 2 and 2−2 orbitals, resulting in an exceptionally isotropic superconducting characteristic. These findings indicate the significant contribution of the 2 orbital to superconductivity in pressurized La4Ni3O10− and provide essential constraints for theoretical models of the pairing mechanism in Ruddlesden-Popper nickelates.
