arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.05902cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
收藏

三维Skyrmion/LiNbO_3晶体中的电输运

Electric transport in three-dimensional Skyrmion/monopole crystal

Xiao-Xiao Zhang, Andrey S. Mishchenko, Giulio De Filippis, Naoto Nagaosa

摘要:

我们从理论上研究了由三个正交螺旋构成的三维自旋织构的输运性质,该织构本质上是由Skyrmion弦连接的自旋-反自旋对构成的晶格。根据中子散射实验和洛仑兹透射电子显微镜观察,提出了MnGe的这种自旋结构。我们采用有限温度格林函数技术,结合复杂的谱分析方法,计算了该体系的纵向直流电输运。我们考虑传导电子与自旋波的拓扑非平凡的自旋织构,其中单极出射磁场波动进入相互作用。我们详细研究了温度、外磁场和特征磁致伸缩运动的影响下的电阻率行为,特别是描述MnGe中最新实验观察的一种新的磁阻效应,其中确定了一种拓扑相变,表示强关联。

英文摘要:

We study theoretically the transport properties of a three-dimensional spin texture made from three orthogonal helices, which is essentially a lattice of monopole-antimonopole pairs connected by Skyrmion strings. This spin structure is proposed for MnGe based on the neutron scattering experiment as well as the Lorentz transmission electron microscopy observation. Equipped with a sophisticated spectral analysis method, we adopt finite temperature Green's function technique to calculate the longitudinal dc electric transport in such system. We consider conduction electrons interacting with spin waves of the topologically nontrivial spin texture, wherein fluctuations of monopolar emergent magnetic field enter. We study in detail the behavior of electric resistivity under the influence of temperature, external magnetic field and a characteristic monopole motion, especially a novel magnetoresistivity effect describing the latest experimental observations in MnGe, wherein a topological phase transition signifying strong correlation is identified.

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。

↑