دورية أكاديمية
Unconventional conductivity increase in multilayer black phosphorus
| العنوان: | Unconventional conductivity increase in multilayer black phosphorus |
|---|---|
| المؤلفون: | Maria Koleśnik-Gray, Laura Meingast, Martin Siebert, Tim Unbehaun, Tobias Huf, Günter Ellrott, Gonzalo Abellán, Stefan Wild, Vicent Lloret, Udo Mundloch, Julian Schwarz, Michael Niebauer, Maximilian Szabo, Mathias Rommel, Andreas Hutzler, Frank Hauke, Andreas Hirsch, Vojislav Krstić |
| المصدر: | npj 2D Materials and Applications, Vol 7, Iss 1, Pp 1-7 (2023) |
| بيانات النشر: | Nature Portfolio, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Chemistry |
| مصطلحات موضوعية: | Materials of engineering and construction. Mechanics of materials, TA401-492, Chemistry, QD1-999 |
| الوصف: | Abstract Multilayers of so-called 2D van der Waals materials have gained considerable attention as active components of next-generation electronic and optoelectronic technologies, with semiconducting black phosphorus (BP) regarded as one of the most promising systems. The applicability and performance limits of BP in both stand-alone and heterostructure-based multilayer devices are determined by individual flake charge transport properties, which synergistically depend on the number of layers and the strength of interlayer coupling between those. In this work, we study the DC electrical transport characteristics of high-quality BP field-effect devices within a wide range of flake thicknesses at room temperature. The experimental data show a non-trivial increase in conductivity and hole density with a reduced number of layers while maintaining constant field-effect mobility due to the prevalence of electron–phonon scattering. Based on the solution of the 1D Schrödinger–Poisson equation, we find that the observed phenomena are a direct consequence of non-negligible interlayer coupling, which in turn causes a local redistribution of free charge carriers towards the central layers. Our data show that due to the electrostatic conditions at the flake surfaces, a naturally protected 2D hole gas can be encapsulated in flakes as high as 10 nm, which preserves the bulk-like bandgap and effective carrier masses due to the electrostatic environment. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2397-7132 |
| Relation: | https://doaj.org/toc/2397-7132 |
| DOI: | 10.1038/s41699-023-00384-2 |
| URL الوصول: | https://doaj.org/article/d2126918a07548cba8297a67eaac13af |
| رقم الأكسشن: | edsdoj.2126918a07548cba8297a67eaac13af |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 23977132 |
|---|---|
| DOI: | 10.1038/s41699-023-00384-2 |