论文标题
在石墨烯中与Fe分子中的双通道围绕耦合
Double single-channel Kondo coupling in graphene with Fe molecules
论文作者
论文摘要
我们研究石墨烯和单分子磁铁之间的相互作用，[Fe4（l）2（dpm）6]。为了将最接近的铁离子在空心位置相对于石墨烯片，我们得出了通道选择性的隧道汉密尔顿隧道，将铁原子的不同d轨道伴随，以精确的Sublattice和山地电子自由度的独立组合。当查看分子和石墨烯电子之间的自旋旋转相互作用时，靠近迪拉克点，通道的选择性导致近托相互作用的通道解耦，两个几乎独立的近距系统之间存在薄弱的相互作用。磁矩的形成和完整的近核效应的发展取决于石墨烯层的电荷状态。
We study the interaction between graphene and a single-molecule-magnet, [Fe4(L)2(dpm)6]. Focusing on the closest Iron ion in a hollow position with respect to the graphene sheet, we derive a channel selective tunneling Hamiltonian, that couples different d orbitals of the Iron atom to precise independent combinations of sublattice and valley degrees of freedom of the electrons in graphene. When looking at the spin-spin interaction between the molecule and the graphene electrons, close to the Dirac point the channel selectivity results in a channel decoupling of the Kondo interaction, with two almost independent Kondo systems weakly interacting among themselves. The formation of magnetic moments and the development of a full Kondo effect depends on the charge state of the graphene layer.
