论文标题
通过轨道重生控制表面沉积之间的磁相互作用
Control of magnetic interactions between surface adatoms via orbital repopulation
论文作者
论文摘要
我们提出了一种可逆的机制，用于切换海森堡型交换相互作用，从铁磁到抗铁磁磁性之间的沉积过渡金属正数之间进行了交换。使用第一原理计算，我们表明，可以通过使用电气控制的轨道重新构造来实现黑磷表面上的钴原子的这种机制，这是扫描探针技术最近证明的[NAT。社区。 9，3904（2018）]。我们发现，野外诱导的重生不仅会影响自旋状态，还会引起对Adatoms之间的交换相互作用的重大修改，包括其符号。我们的模型分析表明，可变的Adatom-Substrate杂交是负责此修饰的关键因素。我们对非弹性隧道特征进行量子模拟，并讨论实验验证所提出的机制的可能方法。
We propose a reversible mechanism for switching Heisenberg-type exchange interactions between deposited transition metal adatoms from ferromagnetic to antiferromagnetic. Using first-principles calculations, we show that this mechanism can be realized for cobalt atoms on the surface of black phosphorus by making use of electrically-controlled orbital repopulation, as recently demonstrated by scanning probe techniques [Nat. Commun. 9, 3904 (2018)]. We find that field-induced repopulation not only affects the spin state, but also causes considerable modification of exchange interaction between adatoms, including its sign. Our model analysis demonstrates that variable adatom-substrate hybridization is a key factor responsible for this modification. We perform quantum simulations of inelastic tunneling characteristics and discuss possible ways to verify the proposed mechanism experimentally.
