The minimal-coupled Pauli equation is used to calculate the linear microscopic spin conductivity tensor of a circular mesoscopic free-electron ring possessing complete (single-level) transverse electron confinement. A detailed comparison of the structures (and magnitudes) of the spin and space conductivity tensors is made. When the incident electric field is polarized perpendicular to the plane of the ring only the spin conductivity is nonvanishing. The polarization selection rules for the spin conductivity always involve a transfer of orbital angular momentum between neighbouring running ring states. Numerical spectral results are presented for a nano-sized Al ring excited perpendicular to the ring plane for different temperatures. The frequency spectra of the relevant spin conductivity component are qualitatively different for rings holding even and uneven half number of electrons due to different state occupancy probabilities near the Fermi edge. Far-field electromagnetic sca...

中文翻译：

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介观环中的自旋电动力学

最小耦合的Pauli方程用于计算具有完整（单级）横向电子约束的圆形介观自由电子环的线性微观自旋电导张量。进行了自旋和空间电导张量的结构（和大小）的详细比较。当入射电场垂直于环平面极化时，自旋电导率将消失。自旋电导率的极化选择规则始终涉及相邻运行环状态之间的轨道角动量转移。给出了在不同温度下垂直于环平面激发的纳米级Al环的数值光谱结果。由于在费米边缘附近的状态占有概率不同，对于持有偶数个电子且不均匀一半电子的环，相关自旋电导率分量的频谱在质量上是不同的。远场电磁扫描仪