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arXiv 2602.03597cond-mat.mes-hall
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量子克里斯托费尔非线性磁化

Quantum Christoffel Nonlinear Magnetization

Southern University of Science and Technology (SUSTech)(南方科技大学);Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (Guangdong)(粤港澳大湾区量子科学中心(广东));Peking University(北京大学);Fudan University(复旦大学);Hefei National Laboratory(合肥国家实验室)

Xiao-Bin Qiang, Xiaoxiong Liu, Hai-Zhou Lu, X. C. Xie

AI总结:

本研究发现电场可诱导量子材料中非线性磁化,通过量子克里斯托费尔符号描述,无需自旋轨道耦合或反演对称破缺,并通过实验确定若干候选材料。

摘要:

克里斯托费尔符号是爱因斯坦广义相对论中的基本量。我们发现电场可以在量子材料中诱导非线性磁化,这种磁化由在量子态希尔伯特空间中定义的克里斯托费尔符号(量子克里斯托费尔符号)描述。与以往的场景不同,这种轨道磁化不需要自旋轨道耦合和反演对称破缺。通过对称性分析和从头计算,我们确定了一些点群和二维材料候选者(例如BiF₃、ZnI₂和Ru₄Se₅)能够宿主这种量子克里斯托费尔非线性磁化。更重要的是,这种非线性磁化使量子克里斯托费尔符号可以通过磁光 Kerr 光谱或隧道磁电阻等光学技术进行探测。这种量子克里斯托费尔非线性磁化为几何如何决定物理提供了一个范例。

英文摘要:

The Christoffel symbol is an essential quantity in Einstein's general theory of relativity. We discover that an electric field can induce a nonlinear magnetization in quantum materials, described by a Christoffel symbol defined in the Hilbert space of quantum states (quantum Christoffel symbol). Quite different from the previous scenarios, this orbital magnetization does not need spin-orbit coupling and inversion symmetry breaking. Through symmetry analysis and first-principles calculations, we identify a number of point groups and 2D material candidates (e.g., BiF$_3$, ZnI$_2$, and Ru$_4$Se$_5$) that host this quantum Christoffel nonlinear magnetization. More importantly, this nonlinear magnetization allows the quantum Christoffel symbol to be probed by optical techniques such as magneto-optical Kerr spectroscopy or transport measurements such as tunneling magneto-resistance. This quantum Christoffel nonlinear magnetization gives a paradigm of how geometry dictates physics.

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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