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arXiv 1602.04141cond-mat.str-el
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关联电子系统自旋动力学的通用方法

Versatile Approach to the Spin Dynamics in Correlated Electron Systems

Malte Behrmann, Alexander I. Lichtenstein, Mikhail I. Katsnelson, Frank Lechermann

摘要:

凝聚态物质中的时间相关自旋现象通常是通过能带理论在金属Stoner/Slater类磁性的弱相关极限中描述的,或者是在绝缘体中海森堡类相互作用自旋的强相关极限中描述的。然而,许多实验研究,例如磁化(去)过程,集中在巡回本地矩材料,如过渡金属及其各种化合物。我们在这里提出了一个一般的理论框架,能够解决相关的自旋动力学,也在存在的消失的电荷间隙。一个真实的空间实现的时间相关的旋转不变的从玻色子方法允许处理非平衡自旋数字快速和有效地超越线性响应,以及超越带理论或海森堡限制。

英文摘要:

Time-dependent spin phenomena in condensed matter are most often either described in the weakly correlated limit of metallic Stoner/Slater-like magnetism via band theory or in the strongly correlated limit of Heisenberg-like interacting spins in an insulator. However many experimental studies, e.g. of (de)magnetization processes, focus on itinerant local-moment materials such as transition metals and various of their compounds. We here present a general theoretical framework that is capable of addressing correlated spin dynamics, also in the presence of a vanishing charge gap. A real-space implementation of the time-dependent rotational-invariant slave boson methodology allows to treat non-equilibrium spins numerically fast and efficiently beyond linear response as well as beyond the band-theoretical or Heisenberg 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。

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