Computing Resonant Inelastic X-Ray Scattering Spectra Using The Density Matrix Renormalization Group Method.

ABSTRACT: We present a method for computing the resonant inelastic x-ray scattering (RIXS) spectra in one-dimensional systems using the density matrix renormalization group (DMRG) method. By using DMRG to address this problem, we shift the computational bottleneck from the memory requirements associated with exact diagonalization (ED) calculations to the computational time associated with the DMRG algorithm. This approach is then used to obtain RIXS spectra on cluster sizes well beyond state-of-the-art ED techniques. Using this new procedure, we compute the low-energy magnetic excitations observed in Cu L-edge RIXS for the challenging corner shared CuO₄ chains, both for large multi-orbital clusters and downfolded t-J chains. We are able to directly compare results obtained from both model

SUBMITTER: Nocera A 

PROVIDER: S-EPMC6056525 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature