论文标题
三角形旋转1链中的电驱动的单线旋转过渡
Electrically driven singlet-triplet transition in triangulene spin-1 chains
论文作者
论文摘要
最近，Mishra和同事（自然598，287（2021））通过STM方法对石墨烯三角形链进行了合成，并通过STM方法分析了它们的磁反应。在这项研究中，我们通过以磁力定理的精神计算两旋旋转来确定三角链链的交换双线性和二级线。然后，我们分析开放式的，奇数的链，其边缘状态对形成三胞胎基态。我们提出了三种实验方法，使我们能够触发和控制单线三旋转旋转过渡。这些方法中的两种基于对链的机械失真应用。我们最终表明，可以通过应用电场来有效控制过渡。
Recently, graphene triangulene chains have been synthesized and their magnetic response has been analyzed by STM methods by Mishra and coworkers (Nature 598, 287 (2021)). Motivated by this study, we determine the exchange bilinear and biquadratic constants of the triangulene chains by calculating two-spin rotations in the spirit of the magnetic force theorem. We then analyze open-ended, odd-numbered chains, whose edge states pair up forming a triplet ground state. We propose three experimental approaches that enable us to trigger and control a singlet-triplet spin transition. Two of these methods are based on applying a mechanical distortion to the chain. We finally show that the transition can be controlled efficiently by the application of an electric field.
