Spatial Mapping of Electrostatic Fields in 2D Heterostructures
| العنوان: | Spatial Mapping of Electrostatic Fields in 2D Heterostructures |
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| المؤلفون: | Nathaniel P. Stern, Akshay A. Murthy, Roberto dos Reis, Takashi Taniguchi, Vinayak P. Dravid, Teodor K. Stanev, Stephanie M. Ribet, Kenji Watanabe, Pufan Liu |
| المصدر: | Nano Lett |
| بيانات النشر: | American Chemical Society (ACS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, Mechanical Engineering, Charge density, Bioengineering, Heterojunction, General Chemistry, Filter (signal processing), Condensed Matter Physics, Article, Computational physics, Electric field, A priori and a posteriori, General Materials Science, Nanoscopic scale, In situ electron microscopy, Image resolution |
| الوصف: | In situ electron microscopy is an effective tool for understanding the mechanisms driving novel phenomena in 2D structures. However, due to practical challenges, it is difficult to address these technologically relevant 2D heterostructures with electron microscopy. Here, we use the differential phase contrast (DPC) imaging technique to build a methodology for probing local electrostatic fields during electrical operation with nanoscale spatial resolution in such materials. We find that, by combining a traditional DPC setup with a high-pass filter, we can largely eliminate electric fluctuations emanating from short-range atomic potentials. Using a method based on this filtering algorithm, a priori electric field expectations can be directly compared with experimentally derived values to readily identify inhomogeneities and potentially problematic regions. We use this platform to analyze the electric field and charge density distribution across layers of hBN and MoS(2). |
| تدمد: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c01636 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce8fc719714e56adee87375a8c5562af https://doi.org/10.1021/acs.nanolett.1c01636 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....ce8fc719714e56adee87375a8c5562af |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15306992 15306984 |
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| DOI: | 10.1021/acs.nanolett.1c01636 |