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arXiv 2607.02418cond-mat.mes-hallcond-mat.mtrl-sci
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非均匀电场中的本征轨道霍尔效应

Intrinsic orbital Hall effect in a nonuniform electric field

Pohang University of Science and Technology(浦项科技大学);University of Alberta(阿尔伯塔大学)

Min Ju Park, Jongjun M. Lee, Hyun-Woo Lee

AI总结:

通过几何分析建立轨道角动量输运与布洛赫波函数几何性质的联系,推导出非均匀电场下本征轨道霍尔电导率由轨道贝里曲率和量子度量表示,并揭示高阶响应对样品取向的敏感性。

摘要:

电子布洛赫态的几何分析为理解电子性质提供了一个通用框架,但其在轨道角动量输运中的作用尚未被探索。在这项工作中,我们建立了电子系统中轨道角动量输运与布洛赫波函数几何性质之间的解析联系。关注在空间非均匀电场下直流极限中的本征轨道霍尔效应,我们证明其电导率可以用通用几何量(如轨道贝里曲率和量子度量)表示。该公式提供了与先前研究中建立的本征电荷霍尔输运几何描述的一一对应。使用紧束缚模型,我们进一步说明高阶轨道霍尔响应可以表现出对各项异性样品取向的增强敏感性。我们的工作加深了对不同本征横向输运现象以及量子几何在电子系统中作用的理解。

英文摘要:

Geometric analysis of electronic Bloch states offers a universal framework for understanding electronic properties, yet its role in the transport of orbital angular momentum remains unexplored. In this work, we establish an analytic connection between orbital angular momentum transport and the geometric properties of Bloch wave functions in electronic systems. Focusing on the intrinsic orbital Hall effect in the dc limit under a spatially nonuniform electric field, we show that its conductivity can be expressed in terms of universal geometric quantities, such as the orbital Berry curvature and quantum metric. This formulation provides a term-by-term correspondence with the geometric description of intrinsic charge Hall transport established in previous studies. Using a tight-binding model, we further illustrate that the higher-order orbital Hall response can exhibit enhanced sensitivity to the orientation of an anisotropic sample. Our work deepens the understanding of diverse intrinsic transverse transport phenomena and the role of quantum geometry in electronic systems.

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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