近日，吉利大学崔田团队报道了高压下Kagome硼化钙的超导性记录。相关论文于2025年10月23日发表在《美国化学会志》上。

通过高压稳定的外来化学计量轻元素化合物为寻找高温超导体提供了广阔的空间。尽管有许多理论预测，但由于其复杂的晶体结构和丰富的物理现象，该体系中新的超导相的实验发现受到了很大的阻碍。

研究组展示了kagome超导体P6/mmm CaB₃的高压合成，T_c ~ 22 K比任何已知的kagome超导体都高。理论计算表明，P6/mmm - CaB₃的超导性主要由B - kagome晶格和B - p轨道电子之间的振动耦合驱动。该研究阐明了Ca-B体系中前所未有的kagome晶格，为探索轻元素超导体提供了深刻的见解。

附：英文原文

Title: Record Superconductivity in a Kagome Calcium Boride at High Pressure

Author: Kexin Zhang, Jingkun Yu, Simin Li, Yuchen Zhang, Yuzhi Chen, Xiaoli Huang, Tian Cui

Issue&Volume: October 23, 2025

Abstract: Exotic stoichiometric light-element compounds stabilized by high pressure deliver a plentiful playground in the search for high-temperature superconductors. The experimental discovery of new superconducting phases in this system has been greatly hurdled owing to their complex crystal structures and rich physical phenomena despite numerous theoretical predictions. Here we demonstrate the high-pressure synthesis of a kagome superconductor P6/mmm CaB3 with Tc ～ 22 K, higher than any of the already known kagome superconductors. Based on theoretical calculations, the superconductivity in P6/mmm CaB3 is predominantly driven by the coupling of the vibrations between the B kagome lattice and the p-orbital electrons of B. This research elucidates an unprecedented kagome lattice in the Ca–B system, providing profound insights for the exploration of light-element superconductors.

DOI: 10.1021/jacs.5c11841

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c11841