Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets
强关联电子
2009-10-30 v1 超导电性
摘要
Using the self-consistent Born approximation, and the corresponding wave function of the magnetic polaron, we calculate the quasiparticle weight corresponding to destruction of a real electron (in contrast to creation of a spinless holon), as a funtion of wave vector for one hole in a generalized model and the strong coupling limit of a generalized Hubbard model. The results are in excellent agreement with those obtained by exact diagonalization of a sufficiently large cluster. Only the Hubbard weigth compares very well with photoemission measurements in Sr_2CuO_2Cl_2.
引用
@article{arxiv.cond-mat/9702100,
title = {Quasiparticle photoemission intensity in doped two-dimensional quantum antiferromagnets},
author = {F. Lema and A. A. Aligia},
journal= {arXiv preprint arXiv:cond-mat/9702100},
year = {2009}
}
备注
11 pages, latex, 3 figures