Single-hole dynamics in dimerized and frustrated spin-chains
强关联电子
2009-10-31 v1
摘要
We present a unified account for the coupled single-hole- and spin-dynamics in the spin-gap phase of dimerized and frustrated spin-chains and two-leg spin ladders. Based on the strong dimer-limit of a one-dimensional --model a diagrammatic approach is presented which employs a mapping of the spin-Hamiltonian onto a pseudo-fermion bond-boson model. Results for the single-hole spectrum are detailed. A finite quasi-particle weight is observed and studied for a variety of system parameters. A comparison with existing exact diagonalization data is performed and good agreement is found.
引用
@article{arxiv.cond-mat/0007447,
title = {Single-hole dynamics in dimerized and frustrated spin-chains},
author = {Christoph Jurecka and Wolfram Brenig},
journal= {arXiv preprint arXiv:cond-mat/0007447},
year = {2009}
}
备注
10 pages, 12 figures