Ray Mayukh Kumar, Fu Mingxuan, Chen Youzhe, Chen Taishi, Nomoto Takuya, Sakai Shiro, Kitatani Motoharu, Hirayama Motoaki, Imajo Shusaku, Tomita Takahiro, Sakai Akito, Nishio-Hamane Daisuke, McCandless Gregory T, Suzuki Michi-To, Xu Zhijun, Zhao Yang, Fennell Tom, Kohama Yoshimitsu, Chan Julia Y, Arita Ryotaro, Broholm Collin, Nakatsuji Satoru
Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Nat Commun. 2025 Apr 18;16(1):3532. doi: 10.1038/s41467-025-58476-0.
Magnetically intercalated transition metal dichalcogenides (TMDs) provide a versatile three-dimensional (3D) material platform to explore quantum phenomena and functionalities that emerge from an intricate interplay among magnetism, band structure, and electronic correlations. Here, we report the observation of a nearly magnetization-free anomalous Hall effect (AHE) accompanied by non-Fermi liquid (NFL) behavior and collinear antiferromagnetism (AFM) in VNbS. Our single-crystal neutron diffraction measurements identify a commensurate, collinear AFM order formed by intercalated V moments. In the magnetically ordered state, the spontaneous AHE is tenfold greater than expected from empirical scaling with magnetization, and this strongly enhanced AHE arises in the NFL regime that violates the quasiparticle picture. VNbS challenges the existing single-particle framework for understanding AHEs based on one-body Berry curvature and highlights the potential of magnetically intercalated TMDs to unveil new electronic functionalities where many-body correlations play a critical role.
磁性插层过渡金属二硫属化物（TMDs）提供了一个通用的三维（3D）材料平台，用于探索由磁性、能带结构和电子关联之间复杂相互作用产生的量子现象和功能。在此，我们报告在VNbS中观察到几乎无磁化的反常霍尔效应（AHE），同时伴有非费米液体（NFL）行为和共线反铁磁性（AFM）。我们的单晶中子衍射测量确定了由插层V矩形成的相称共线AFM序。在磁有序状态下，自发AHE比根据磁化的经验标度预期的大十倍，并且这种强烈增强的AHE出现在违反准粒子图像的NFL区域。VNbS挑战了基于一体贝里曲率理解AHE的现有单粒子框架，并突出了磁性插层TMDs揭示多体关联起关键作用的新电子功能的潜力。
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