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Electro-optical properties of phoshorene quantum dots

Saroka, Vasil; Lukyanchuk, I.; Portnoi, M.E.; Abdelsalam, H.
Journal article, Peer reviewed
Published version
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URI
http://hdl.handle.net/11250/2592504
Date
2017
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  • Institutt for fysikk [1817]
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Original version
Physical Review B. 2017, 96 (8), 085436-1-085436-13.   10.1103/PhysRevB.96.085436
Abstract
We study electronic and optical properties of single layer phosphorene quantum dots with various shapes, sizes, and edge types (including disordered edges) subjected to an external electric field normal to the structure plane. Compared to graphene quantum dots, in phosphorene clusters of similar shape and size there is a set of edge states with energies dispersed at around the Fermi level. These states make the majority of phosphorene quantum dots metallic and enrich the phosphorene absorption gap with low-energy absorption peaks tunable by the electric field. The presence of the edge states dispersed at around the Fermi level is a characteristic feature that is independent of the edge morphology and roughness.
Publisher
American Physical Society
Journal
Physical Review B

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