Evolution of magnetic structure driven by synthetic spin-orbit coupling in a two-component Bose-Hubbard model
Evolution of magnetic structure driven by synthetic spin-orbit coupling in a two-component Bose-Hubbard model
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二分量 Bose-Hubbard 模型中合成自旋轨道耦合驱动的磁结构演化
DOI：
10.1103/physrevb.90.085117
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发表时间：
2014-03
影响因子：
3.7
通讯作者：
Wang, Xiaoqun
中科院分区：
文献类型：
--
作者：
Chang, Jun;Zheng, Fawei;Zhang, Ping;Wang, Xiaoqun
在一维二分量Bose-Hubbard模型中研究了自旋轨道耦合驱动下磁结构的演化。除了Mott绝缘体-超流转变之外，在Mott绝缘体相中，我们发现通过增加自旋-轨道耦合的强度，从带隙铁磁相到无隙手性相的转变。进一步增加自旋-轨道耦合驱动从无带隙手性相到带隙反铁磁相的转变。这些磁性结构在超流体阶段持续存在。特别是，在手征莫特绝缘体和手征超流相，不可分割性观察到的特征相关函数。这些非常规的Mott绝缘体相和超流相表明了动能和自旋轨道耦合之间的竞争所产生的不同效应。
We study the evolution of magnetic structures driven by a synthetic spin-orbit coupling in a one-dimensional two-component Bose-Hubbard model. In addition to the Mott insulator-superfluid transition, in the Mott insulator phases we found a transition from a gapped ferromagnetic phase to a gapless chiral phase by increasing the strength of the spin-orbit coupling. Further increasing the spin-orbit coupling drives a transition from the gapless chiral phase to a gapped antiferromagnetic phase. These magnetic structures persist in superfluid phases. In particular, in the chiral Mott insulator and chiral superfluid phases, incommensurability is observed in characteristic correlation functions. These unconventional Mott insulator phase and superfluid phase demonstrate the different effects arising from the competition between the kinetic energy and the spin-orbit coupling.
DOI：
10.1007/0-387-21717-7_1
发表时间：
1999-10
期刊：
--
影响因子：
--
作者：
K. Hallberg
通讯作者：
K. Hallberg