论文标题
lankzos密度 - 矩阵ren量化组方法在海森堡链中旋转转运的方法
Block-Lanczos density-matrix renormalization-group approach to spin transport in Heisenberg chains coupled to leads
论文作者
论文摘要
我们适应了块状长度密度 - 马trix重新归一化组技术，以研究自旋链中的自旋转运，并耦合到两个非相互作用的费米管铅。例如，我们考虑在方格上用二维紧密结合模型描述的铅。尽管模拟是使用导线的链表示进行的，但是可以通过逆转块 - 朗索斯转换来计算原始二维晶格中的可观察物。与Rashba自旋轨道耦合的铅证明了这一点。
We adapt the block-Lanczos density-matrix renormalization-group technique to study the spin transport in a spin chain coupled to two non-interacting fermionic leads. As an example, we consider leads described by two-dimensional tight-binding models on a square lattice. Although the simulations are carried out using a chain representation of the leads, observables in the original two-dimensional lattice can be calculated by reversing the block-Lanczos transformation. This is demonstrated for leads with Rashba spin-orbit coupling.
