Exciton ionization in multilayer transition-metal dichalcogenides
| Author(s) | Pedersen,Thomas Garm | |
| Author(s) | Latini,Simone | |
| Author(s) | Thygesen,Kristian S. | |
| Author(s) | Mera,Hector | |
| Author(s) | Nikolic,Branislav K. | |
| Ordered Author | Thomas Garm Pedersen, Simone Latini, Kristian S Thygesen, Hector Mera and Branislav K Nikolic | |
| UD Author | Mera Couto, Hector; Nikolic, Branislav | |
| Date Accessioned | 2017-07-19T18:48:37Z | |
| Date Available | 2017-07-19T18:48:37Z | |
| Copyright Date | 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft | |
| Publication Date | 7/25/16 | |
| Description | Publisher's PDF | |
| Abstract | Photodetectors and solar cells based on materials with strongly bound excitons rely crucially on field-assisted exciton ionization. We study the ionization process in multilayer transition-metal dichalcogenides (TMDs) within the Mott-Wannier model incorporating fully the pronounced anisotropy of these materials. Using complex scaling, we show that the field-dependence of the ionization process is strongly dependent on orientation. Also, we find that direct and indirect excitons behave qualitatively differently as a result of opposite effective anisotropy of these states. Based on first-principles material parameters, an analysis of several important TMDs reveals WSe2 and MoSe2 to be superior for applications relying on ionization of direct and indirect excitons, respectively. | |
| Department | University of Delaware, Department of Physics and Astronomy | |
| Citation | Pedersen, T. G., Latini, S., Thygesen, K. S., Mera, H., & Nikolic, B. K. (2016). Exciton ionization in multilayer transition-metal dichalcogenides. New Journal of Physics, 18, 073043. doi:10.1088/1367-2630/18/7/073043 | |
| DOI | 10.1088/1367-2630/18/7/073043 | |
| ISSN | 1367-2630 | |
| URL | http://udspace.udel.edu/handle/19716/21558 | |
| Language | English | |
| Publisher | IOP Publishing Ltd | |
| dc.rights | CC BY 3.0 | |
| dc.source | New Journal of Physics | |
| dc.source.uri | http://iopscience.iop.org/article/10.1088/1367-2630/18/7/073043/meta;jsessionid=81A6989600B31A9FA28DE273DE95A1C2.c2.iopscience.cld.iop.org | |
| Title | Exciton ionization in multilayer transition-metal dichalcogenides | |
| Type | Article |
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