2020/01/31 by Florian Lange, F. Lange, S. Ejima +7 · 3 citations
Physics and Astronomy · #Chain (unit) #Heisenberg model #Lattice (music) #Observable #Quantum and electron transport phenomena #Quantum many-body systems #Spin (aerodynamics) #Square lattice #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · open access · doi:10.7566/jpsj.89.044601
published in Journal of the Physical Society of Japan 89(4), 044601 (Physical Society of Japan) · 6 pages, 6 figures, final version
openalex created_date 2020/01/23 · arxiv created 2020/03/06 · openalex publication_date 2020/03/06 · arxiv updated 2020/03/09 · openalex updated_date 2026/08/05
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.