arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1311.2687cond-mat.str-el
收藏

拓扑绝缘体中的自旋-自旋相互作用

Spin-spin interaction in the bulk of topological insulators

Jinhua Sun, Liang Chen, Hai-Qing Lin

摘要:

本文应用平均场论和Hirsch-Fye量子蒙特卡罗方法研究了三维拓扑绝缘体中的自旋-自旋相互作用。我们发现自旋-自旋相互作用有三个不同的分量:纵向,横向和横向Dzyaloshinskiii-Moriya-like项。当费米能级位于拓扑绝缘体的体带隙中时,自旋-自旋相互作用由于Bloembergen-Rowland相互作用而呈指数衰减。纵向关联是反铁磁的,横向关联是铁磁的。当化学势位于导带或价带时,自旋-自旋相互作用服从幂律衰减,在短分离极限时,各向同性铁磁相互作用占主导地位。

英文摘要:

We apply mean-field theory and Hirsch-Fye quantum Monte Carlo method to study the spin-spin interaction in the bulk of three-dimensional topological insulators. We find that the spin-spin interaction has three different components: the longitudinal, the transverse and the transverse Dzyaloshinskii-Moriya-like terms. When the Fermi energy is located in the bulk gap of topological insulators, the spin-spin interaction decays exponentially due to Bloembergen-Rowland interaction. The longitudinal correlation is antiferromagnetic and the transverse correlations are ferromagnetic. When the chemical potential is in the conduction or valence band, the spin-spin interaction follows power law decay, and isotropic ferromagnetic interaction dominates in short separation limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑