各向异性范德华材料中几何调控的磁性与电子景观
Geometry-Controlled Magnetic and Electronic Landscapes in Anisotropic van der Waals Materials
浏览论文内容
中文总结 AI 辅助
该研究提出几何电子学概念，利用衬底几何调控各向异性范德华材料CrSBr的局部晶体取向，实现单一晶体内多磁相共存及可切换激子势阱，为编程磁电景观提供新设计原则。
中文摘要 AI 辅助
范德华材料的电子结构通常通过成分、应变、静电门控和异质结组装进行调控。本文引入几何电子学（geometronics）这一概念，即通过衬底几何结构局部重取向各向异性晶体，将均匀的外部扰动转化为可编程的磁性与电子景观。我们利用反铁磁半导体CrSBr的双层结构，将其转移至倒金字塔形纳米压痕上对该概念进行验证：相对于外磁场的局部晶体取向，在单一连续晶体内驱动了反铁磁相与铁磁相的共存。产生的磁性景观形成了最高达10-12 meV的可切换激子势阱，通过空间分辨光谱直接可视化。更广泛而言，几何电子学为确定性编程电子与磁性景观提供了通用途径，且无需改变材料本身，确立了衬底形貌作为利用层状范德华材料固有各向异性的新设计原则。
英文摘要
Electronic structure in van der Waals materials is commonly engineered through composition, strain, electrostatic gating and heterostructure assembly. Here we introduce geometronics, a concept in which substrate geometry locally reorients an anisotropic crystal, transforming homogeneous external perturbation into programmable magnetic and electronic landscapes. We demonstrate this concept using a bilayer of the antiferromagnetic semiconductor CrSBr transferred onto an inverted pyramidal nanoindentation, where the local crystal orientation with respect to the external magnetic field drives the coexistence of antiferromagnetic and ferromagnetic phases within a single continuous crystal. The resulting magnetic landscape creates a switchable excitonic potential well of up to 10--12 meV, directly visualised by spatially resolved spectroscopy. More generally, geometronics provides a universal route for deterministically programmed electronic and magnetic landscapes without modifying the material itself. It therefore establishes substrate topography as a new design principle that exploits the intrinsic anisotropy of layered van der Waals materials.
发表机构
- Wroclaw University of Science and Technology（弗罗茨瓦夫理工大学）
- University of Warsaw（华沙大学）
- Wrocław University of Science and Technology（弗罗茨瓦夫理工大学）
- University of Chemistry and Technology Prague（布拉格化工大学）
机构由 AI 辅助整理，请以论文原文为准。
