Academic Journal
Strain-induced bound states in transition-metal dichalcogenide bubbles
| العنوان: | Strain-induced bound states in transition-metal dichalcogenide bubbles |
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| المؤلفون: | Chirolli, L., Prada, E., Guinea, F., Roldán, R., San-Jose, P. |
| المساهمون: | UAM. Departamento de Física de la Materia Condensada |
| بيانات النشر: | Institute of Physics Publishing Ltd. |
| سنة النشر: | 2020 |
| المجموعة: | Universidad Autónoma de Madrid (UAM): Biblos-e Archivo |
| مصطلحات موضوعية: | Transition metals, Hydrostatic pressure, Layered semiconductors, Molybdenum compounds, Selenium compounds, Semiconducting selenium compounds, Tungsten compounds, Van der Waals forces, Física |
| الوصف: | This is an author-created, un-copyedited version of an article published in 2D Materials. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/2053-1583/ab0113 ; We theoretically study the formation of single-particle bound states confined by strain at the center of bubbles in monolayers of transition-metal dichalcogenides (TMDs). Bubbles ubiquitously form in two-dimensional crystals on top of a substrate by the competition between van der Waals forces and the hydrostatic pressure exerted by trapped fluid. This leads to strong strain at the center of the bubble that reduces the bangap locally, creating potential wells for the electrons that confine states inside. We simulate the spectrum versus the bubble radius for the four semiconducting group VI TMDs, MoS2, WSe2, WS2 and MoSe2, and find an overall Fock-Darwin spectrum of bubble bound states, characterised by small deviations compatible with Berry curvature effects. We analyse the density of states, the state degeneracies, orbital structure and optical transition rules. Our results show that elastic bubbles in these materials are remarkably efficient at confining photocarriers ; We acknowledge funding from the Graphene Flagship, contract CNECTICT-604391, from the Comunidad de Madrid through Grant MAD2D-CM, S2013/MIT-3007, from the Spanish Ministry of Economy and Competitiveness through Grants No. RYC-2011-09345, RYC-2016-20663, FIS2015-65706-P, FIS2016-80434-P (AEI/FEDER, EU) and the María de Maeztu Programme for Units of Excellence in R&D (MDM-2014-0377) |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2053-1583 |
| Relation: | 2D Materials; https://doi.org/10.1088/2053-1583/ab0113; info:eu-repo/grantAgreement/EC/FP7/604391; Comunidad de Madrid. S2013/MIT-3007/MAD2D-CM; Gobierno de España. FIS2015-65706-P; Gobierno de España. FIS2016-80434-P; Gobierno de España. MDM-2014-0377; 2D Materials 6.2 (2019): 025010; http://hdl.handle.net/10486/690154; 025010-1; 025010-9 |
| DOI: | 10.1088/2053-1583/ab0113 |
| الاتاحة: | http://hdl.handle.net/10486/690154 https://doi.org/10.1088/2053-1583/ab0113 |
| Rights: | © 2019 IOP Publishing Ltd. ; openAccess |
| رقم الانضمام: | edsbas.A1E804F6 |
| قاعدة البيانات: | BASE |
| تدمد: | 20531583 |
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| DOI: | 10.1088/2053-1583/ab0113 |