论文标题
意外的持续旋转质地
Accidental persistent spin textures in the proustite mineral family
论文作者
论文摘要
动量空间中的持久性自旋纹理（PST）有可能使自旋型材料中的自旋寿命低限制，这可能会限制自旋型设备。我们对Proustite矿物质家族进行了第一原理研究，Ag $ _3 $ bq $ _3 $}（b = as，\，sb; q = s，\，se），并显示这些chalcogenides表现出非对称的受保护的PST，我们称为对称性辅助辅助使用的PSTS。化学替代可用于调整PST质量和特性，例如自旋寿命，我们发现Rashba各向异性标准与PST区域和Spin Lifetime相关。最后，我们表明，经常在二维系统中使用的一阶有效Soc Hamiltonian不足以描述所有proustites中的PST状态，这表明高阶模型对于在批量三维材料中充分描述PST是必要的。
Persistent spin textures (PSTs) in momentum space have the potential to enable spintronic devices which are currently limited by low spin lifetimes in nonmagnetic spin-orbit coupled materials. We perform a first-principles study on the proustite mineral family, Ag$_3$BQ$_3$} (B=As,\,Sb; Q=S,\,Se), and show these chalcogenides exhibit a non-symmetry protected PST, which we refer to as symmetry-assisted PSTs. Chemical substitution can be used to tune the PST quality and properties, e.g., spin lifetime, and we find that a Rashba anisotropy criterion correlates with the PST area and spin lifetime for two of the three proustites examined. Last, we show that a first-order effective SOC Hamiltonian, often used in two-dimensional systems, is insufficient to describe the PST state in all proustites, suggesting that higher order models are necessary to fully describe PSTs in bulk three-dimensional materials.
