The Nature of the magnetism-promoting hole state in the prototype magnetic semiconductor GaAs: Mn

Observation of the symmetry of core states of a single Fe impurity in GaAs

We report the direct observation of two mid-gap core d-states of differing symmetry for a single Fe atom embedded in GaAs. These states are distinguished by the strength of their hybridization with the surrounding host electronic structure. The mid-gap state of Fe that does not hybridize via sigma-bonding is strongly localized to the Fe atom, whereas the other, which does, is extended and comparable in size to other acceptor states. Tight-binding calculations of these mid-gap states agree with the spatial structure of the measured wave functions, and illustrate that such measurements can deter…

III-V半导体中锰中性受主的自旋轨道纠缠自旋-1相干自旋中心的空问结构和磁性

Spatial structure and magnetism of a spin-orbit entangled spin-1 coherent spin center: the manganese neutral acceptor in a III-V semiconductor

研究III-V半导体中Mn杂质的自旋轨道纠缠基态，揭示其自旋-电荷相关性及显著的磁边缘场，为相干自旋中心的磁性研究提供新视角。

磁性调制二维电子气中涉及整数磁振子与自旋1/2激发的共振

Resonances involving integer magnons and spin-1/2 excitations in a magnetism modulated two-dimensional electron gas

本文实验研究了磁性调制的GaAs/AlGaAs量子阱二维电子气，通过Tb薄膜条纹和光栅在面内磁场下实现了稳健的铁磁共振及高阶整数磁共振，并在单条纹样品中发现了自旋1/2激发的自旋子共振特征。

Nuclear magnetism and electron order in interacting one-dimensional conductors

The interaction between localized magnetic moments and the electrons of a one-dimensional conductor can lead to an ordered phase in which the magnetic moments and the electrons are tightly bound to each other. We show here that this occurs when a lattice of nuclear spins is embedded in a Luttinger liquid. Experimentally available examples of such a system are single wall carbon nanotubes grown entirely from 13C and GaAs-based quantum wires. In these systems the hyperfine interaction between the nuclear spin and the conduction electron spin is very weak, yet it triggers a strong feedback reacti…

Supercoupling between heavy-hole and light-hole states in self-assembled quantum dots

Spintronics, quantum computing and quantum communication science utilizing cubic semiconductors rely largely on the properties of the hole states, composed of light and heavy hole wavefunction components. The admixture of light-hole (LH) into ground hole state predominately by the heavy hole (HH) would induce unique features of LH in optical transitions, spin relaxation, and spin polarization. We point to an unexpected source of HH-LH mixing in quantum dots, arguing that in contrast with current models the mixing does not reflect the strain between the dot and its matrix and does not scale inv…

半导体人工石墨烯中的Nagaoka铁磁性

Nagaoka ferromagnetism in semiconductor artificial graphene

本研究利用高精度Monte Carlo方法与精确对角化计算，证明了在半导体人工石墨烯中由单个电子缺失或添加驱动的Nagaoka铁磁性相变，并揭示了Coulomb散射项在稳定该相变中的关键作用。