Hole Dynamics in the Orthogonal-Dimer Spin System
强关联电子
2016-08-31 v1
摘要
The dynamics of a doped hole in the orthogonal-dimer spin system is investigated systematically in one, two and three dimensions. By combining the bond-operator method with the self-consistent Born approximation, we argue that a dispersive quasi-particle state in the dimer phase is well defined even for quasi-two-dimensional systems. On the other hand, a doped hole in the plaquette-singlet phase hardly itinerates, forming an almost localized mode. We further clarify that although the quasi-particle weight in the dimer phase is decreased in the presence of the interchain coupling, it is not suppressed but even enhanced upon the introduction of the interlayer coupling.
引用
@article{arxiv.cond-mat/0310320,
title = {Hole Dynamics in the Orthogonal-Dimer Spin System},
author = {Y. Saito and A. Koga and N. Kawakami},
journal= {arXiv preprint arXiv:cond-mat/0310320},
year = {2016}
}
备注
8 pages, 10 figures