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arXiv 1408.0769cond-mat.quant-gasquant-ph
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具有SU(3)自旋轨道耦合的玻色莫特绝缘体的螺旋自旋织构

Spiral spin textures of bosonic Mott insulator with SU(3) spin-orbit coupling

Tobias Graß, Ravindra W. Chhajlany, Christine A. Muschik, Maciej Lewenstein

摘要:

通过将光晶格中的三分量玻色子映射到SU(3)自旋模型上,研究了每格点一个粒子的三分量玻色子的Mott相位。在完全SU(3)对称的最简单情况下,我们得到一个铁磁海森堡模型。引入SU(3)自旋-轨道耦合模拟,产生额外的自旋-自旋相互作用。我们首先考虑自旋相关的跳跃阶段的情况下,导致Dzyaloshinskiii-Moriya型的相互作用。它们导致螺旋自旋纹理的形成,在一维中可以通过局部么正变换来理解。应用经典的蒙特卡罗模拟,我们将我们的研究扩展到二维系统,与“真正的”自旋-轨道耦合系统,涉及自旋变化的跳跃。

英文摘要:

We study the Mott phase of three-component bosons, with one particle per site, in an optical lattice by mapping it onto an SU(3) spin model. In the simplest case of full SU(3) symmetry, one obtains a ferromagnetic Heisenberg model. Introducing an SU(3) analog of spin-orbit coupling, additional spin-spin interactions are generated. We first consider the scenario of spin-dependent hopping phases, leading to Dzyaloshinskii-Moriya-type interactions. They result in the formation of spiral spin textures, which in one dimension can be understood by a local unitary transformation. Applying classical Monte Carlo simulations, we extend our study to two-dimensional systems, and systems with "true" spin-orbit coupling, involving spin-changing hoppings.

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。

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