论文标题
评论：“在DNA中转移电子传递的自旋轨道相互作用和自旋选择性”
Comment on: "Spin-orbit interaction and spin selectivity for tunneling electron transfer in DNA"
论文作者
论文摘要
在生物分子中观察手性诱导的自旋选择性（CISS）仍然在等待完整的理论解释。在最近的快速沟通中，Varela等人。 [物理。 Rev. B 101，241410（R）（2020）]在存在自旋轨道相互作用的情况下通过隧穿提出了一种在生物分子中的电子传输模型。然后，他们声称由于固有的原子旋转轨道强度，他们的模型会产生强大的自旋不对称性。由于他们的哈密顿量是时间逆转的对称，因此该结果与Bardarson的定理相矛盾[J.物理。答：数学。理论。 41，405203（2008）]，该]指出，这种哈密顿量无法在两个末端之间产生旋转不对称性（其中只有一个旋转和旋转的通道）。在这里，我们解决了Varela等人提出的模型。并表明它不会产生任何自旋不对称，因此无法解释观察到的CISS效应。
The observation of chiral-induced spin selectivity (CISS) in biological molecules still awaits a full theoretical explanation. In a recent Rapid Communication, Varela et al. [Phys. Rev. B 101, 241410(R) (2020)] presented a model for electron transport in biological molecules by tunneling in the presence of spin-orbit interactions. They then claimed that their model produces a strong spin asymmetry due to the intrinsic atomic spin-orbit strength. As their Hamiltonian is time-reversal symmetric, this result contradicts a theorem by Bardarson [J. Phys. A: Math. Theor. 41, 405203 (2008)], which states that such a Hamiltonian cannot generate a spin asymmetry for tunneling between two terminals (in which there are only a spin-up and a spin-down channels). Here we solve the model proposed by Varela et al. and show that it does not yield any spin asymmetry, and therefore cannot explain the observed CISS effect.
