Prokhorov General Physics Institute, Moscow 119991, Russian Federation.
J Chem Phys. 2019 Nov 28;151(20):204101. doi: 10.1063/1.5127972.
The magnetic response of a particle that tunnels in a double-well potential is considered. The Hamiltonian of the model includes the Zeeman, spin-orbit, and other interactions. The spin state changes due to the motion of electrons in the electric field rather than the action of the magnetic field of nucleus on the electrons. At realistic values of the model parameters, the spin-orbit interaction leads to magnetic effects that resemble those in the well-known radical pair mechanism (RPM) model. In particular, the probability of electron transfer depends on the direction of the magnetic field. At the same time, the model under consideration has distinctions that make it reasonable when searching for a mechanism of nonspecific magnetic biological effects. In particular, unlike in the RPM, the magnitude of the magnetic effect is not limited to a narrow range of the hyperfine interaction. The model enables molecular rotations. This could explain an asymmetry in response to the inversion of the magnetic field vector, which has been observed in experiments.
考虑了在双势阱中隧穿的粒子的磁响应。模型的哈密顿量包括塞曼、自旋轨道和其他相互作用。由于电子在电场中的运动而不是核磁场对电子的作用，自旋态发生了变化。在模型参数的实际值下，自旋轨道相互作用导致了类似于著名的自由基对机制（RPM）模型的磁效应。特别是，电子转移的概率取决于磁场的方向。同时，所考虑的模型具有使其在寻找非特异性磁生物效应机制时合理的区别。特别是，与 RPM 不同，磁效应的大小不受超精细相互作用的窄范围限制。该模型能够实现分子旋转。这可以解释实验中观察到的对磁场矢量反转的响应不对称性。
