非共线磁人工原子中的自旋纹理轨道
Spin-textured orbitals in altermagnetic artificial atoms
- International Center for Quantum Materials, School of Physics, Peking University（北京大学物理学院量子材料国际中心）
- Hefei National Laboratory（合肥国家实验室）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究提出非共线磁人工原子概念，利用动量依赖自旋分裂约束电子，重构出受对称性保护的自旋纹理轨道，应变可调节其简并度，为量子受限系统的自旋依赖轨道工程化提供新途径。
AI中文摘要：
人工原子为类原子轨道的工程化提供了通用平台，但其轨道结构中自旋通常是被动自由度。本文引入非共线磁人工原子概念，通过动量依赖的自旋分裂约束电子形成这类原子。研究表明，非共线磁性会重构常规受限轨道为自旋纹理轨道，使相反自旋分量呈现空间差异化分布；所得受限谱保留受$C_{4z}\boldsymbol{\tau}$对称性保护的二重简并性，该自旋纹理在高能态仍存在，高能态中额外径向结构与特征角向自旋模式结合。此外，应变可将简并轨道对分解为自旋极化态，并连续调节其能量分裂。本研究确立了非共线磁人工原子作为量子受限系统中工程化自旋依赖轨道结构的途径。
英文摘要：
Artificial atoms provide a versatile platform for engineering atomic-like orbitals, yet spin generally remains a passive degree of freedom in their orbital structure. Here, we introduce the concept of altermagnetic artificial atoms formed by confining electrons with momentum-dependent spin splitting. We show that altermagnetism reconstructs conventional confined orbitals into spin-textured orbitals, with spatially distinct distributions of opposite spin components. The resulting confined spectrum retains a twofold degeneracy protected by the combined $C_{4z}\mathcal{T}$ symmetry. These spin textures persist in higher-energy states, where additional radial structures combine with the characteristic angular spin pattern. Furthermore, strain resolves the degenerate orbital pairs into spin-polarized states, and continuously tunes their energy splitting. Our results establish altermagnetic artificial atoms as a route to engineering spin-dependent orbital structures in quantum-confined systems.
