发表机构
Advanced Science Research Center, Japan Atomic Energy Agency; Department of Physics, Institute of Science Tokyo; Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)（日本原子能机构先进科学研究中心; 东京科学大学物理系; 高能加速器研究机构物质结构科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用双电子-μ子共振测定金红石TiO$_2$中Mu中心的电子$g$值，发现其与H相关Ti$^{3+}$中心高度一致，验证了Mu-H对应关系并支持共同的局域Ti$^{3+}$电子核心。
AI 中文摘要
μ子（Mu）被广泛用作凝聚态物质中孤立氢的模型，但其电子态是否真正等同于氢的电子态，仍有待用轨道敏感的探针进行检验。本文利用双电子-μ子共振技术，测定了金红石TiO$_2$中顺磁性Mu中心在磁场沿[100]、[110]和[001]方向时的电子$g$值。所得$g$值在大小和各向异性上均与H相关的Ti$^{3+}$顺磁中心紧密吻合。这一吻合在Ti $3d$电子态层面上检验了Mu-H对应关系，并支持这两个中心具有共同的局域Ti$^{3+}$电子核心。
英文摘要
Muonium (Mu) is widely used as a model for isolated hydrogen in condensed matter, but whether its electronic state is truly equivalent to that of hydrogen remains to be tested with an orbital-sensitive probe. Here we use double electron-muon resonance to determine the electron $g$ values of the paramagnetic Mu center in rutile TiO$_2$ for magnetic fields along [100], [110], and [001] directions. The obtained $g$ values closely follow those of the H-related Ti$^{3+}$ paramagnetic center in both magnitude and anisotropy. This agreement tests the Mu--H correspondence at the level of the Ti $3d$ electronic state and supports a common localized Ti$^{3+}$ electronic core for the two centers.
Comments6 pages, 3 figures
Journal refPhys. Rev. B 114, L140104 (2026)
