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arXiv · 1312.5809

Effects of the spin-orbital coupling on the vacancy-induced magnetism on the honeycomb lattice

Weng-Hang Leong·Shun-Li Yu·Jian-Xin Li
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Abstract

The local magnetism induced by vacancies in the presence of the spin-orbital interaction is investigated based on the half-filled Kane-Mele-Hubbard model on the honeycomb lattice. Using the self-consistent mean-field theory, we find that the spin-orbital coupling will enhance the localization of the spin moments near a single vacancy. We further study the magnetic structures along the zigzag edges formed by a chain of vacancies. We find that the spin-orbital coupling tends to suppress the counter-polarized ferrimagnetic order on the upper and lower edges, because of the open of the spin-orbital gap. As a result, in the case of the balance number of sublattices, it will suppress completely this kind of ferrimagnetic order. But, for the imbalance case, a ferrimagnetic order along both edges exists because additional zero modes will not be affected by the spin-orbital coupling.

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Weng-Hang Leong, Shun-Li Yu, Jian-Xin Li. 2013-12-20. Effects of the spin-orbital coupling on the vacancy-induced magnetism on the honeycomb lattice. https://doi.org/10.1016/j.physleta.2014.05.031

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