论文标题
CDTE/（CD，mg）TE量子井的孔$ g $因子的平面各向异性通过自旋依赖的光子回波研究
The in-plane anisotropy of the hole $g$ factor in CdTe/(Cd,Mg)Te quantum wells studied by spin-dependent photon echoes
论文作者
论文摘要
我们使用两脉冲旋转的光子回波技术来研究平面内孔自旋各向异性，以20〜nm厚的CDTE/CD $ _ {0.76} $ mg $ _ {0.24} $ _ {0.24} $ te单量子，这是令人兴奋的捐助者最佳体能量的单个量子。我们利用了对电子和孔自旋进动的相对相的光子回声敏感性，并研究了有助于孔内旋转特性的各种相互作用。发现主要贡献是由Luttinger参数$ Q = 0.095 $描述的晶体立方对称性产生的，该$ Q = 0.095 $，其大大比CDTE的理论上预期或在其他量子井结构中发现的大。量子井中的应变诱导了另一个贡献。当VOIGT磁场的强度和方向变化时，这两个贡献表现为光子回波实验中自旋进动频率的不同谐波。发现有效的平面孔$ G $因子的大小在$ | \ tilde {g_h} | $ = 0.125--0.160在井中的范围内有所不同。
We use the two-pulse spin-dependent photon echo technique to study the in-plane hole spin anisotropy in a 20~nm-thick CdTe/Cd$_{0.76}$Mg$_{0.24}$Te single quantum well by exciting the donor-bound exciton resonance. We take advantage of the photon echo sensitivity to the relative phase of the electron and hole spin precession and study various interactions contributing to the hole in-plane spin properties. The main contribution is found to arise from the crystal cubic symmetry described by the Luttinger parameter $q=0.095$, which is substantially larger than the one theoretically expected for CdTe or found in other quantum well structures. Another contribution is induced by the strain within the quantum well. These two contributions manifest as different harmonics of the spin precession frequencies in the photon echo experiment, when strength and orientation of the Voigt magnetic field are varied. The magnitude of the effective in-plane hole $g$ factor is found to vary in the range $|\tilde{g_h}|$=0.125--0.160 in the well plane.
