发表机构
University of Missouri; University of Arkansas; Oak Ridge National Laboratory（密苏里大学; 阿肯色大学; 橡树岭国家实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过多种实验手段揭示了磁插层Cr$_{1+x}$Te$_2$中丰富的磁相图，包括Néel型斯格明子相，并展示了化学插层对TMDs磁相互作用和相行为的深刻重塑作用。
AI 中文摘要
化学插层为调控过渡金属二硫属化物（TMDs）的电子和磁性性质提供了强大途径，使得在原始形态中无法获得的磁相和现象得以出现。在此，我们通过结合扫描隧道显微镜、角分辨光电子能谱、磁化测量、电输运和洛伦兹透射电子显微镜等手段，研究了磁插层Cr$_{1+x}$Te$_2$的结构、电子和磁性性质。我们揭示了一个丰富的磁相图，包含顺磁相、面内自旋涨落相、面外铁磁相以及场诱导的Néel型斯格明子相。特别地，洛伦兹透射电子显微镜直接揭示了在居里温度略下方Néel型斯格明子织构的形成，其构型随温度和磁场强烈演化。斯格明子表现出显著的热滞现象，并与条状畴共存，表明由无序诱导的局域Dzyaloshinskii-Moriya相互作用、垂直磁各向异性和偶极相互作用之间的竞争所产生的复杂磁能景观。我们的结果表明，化学插层能深刻重塑TMDs的磁相互作用和相行为，将Cr$_{1+x}$Te$_2$确立为探索低维量子材料中可调磁性、斯格明子物理和非传统热力学现象的通用平台。
英文摘要
Chemical intercalation provides a powerful route for tuning the electronic and magnetic properties of transition metal dichalcogenides (TMDs), enabling the emergence of magnetic phases and phenomena that are otherwise inaccessible in their pristine forms. Here, we investigate the structural, electronic, and magnetic properties of magnetically intercalated Cr$_{1+x}$Te$_2$ through a combination of scanning tunneling microscopy, angle-resolved photoemission spectroscopy, magnetization, electrical transport, and Lorentz transmission electron microscopy measurements. We uncover a rich magnetic phase diagram comprising paramagnetic, in-plane spin-fluctuation, out-of-plane ferromagnetic, and field-induced Néel-type skyrmion phases. In particular, Lorentz transmission electron microscopy directly reveals the formation of Néel-type skyrmion textures slightly below the Curie temperature, with their configurations evolving strongly with temperature and magnetic field. The skyrmions exhibit pronounced thermal hysteresis and coexist with stripe domains, indicative of a complex magnetic energy landscape arising from the competition among disorder-induced local Dzyaloshinskii-Moriya interactions, perpendicular magnetic anisotropy, and dipolar interactions. Our results demonstrate that chemical intercalation can profoundly reshape the magnetic interactions and phase behavior of TMDs, establishing Cr$_{1+x}$Te$_2$ as a versatile platform for exploring tunable magnetism, skyrmion physics, and unconventional thermodynamic phenomena in low-dimensional quantum materials.
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