Two-dimensional PdSe2-Pd2Se3 junctions can serve as nanowires
- Vanderbilt Univ., Nashville, TN (United States)
- National Institute of Advanced Industrial Science and Technology (AIST), Fukushima (Japan); Southern University of Science and Technology, Shenzhen (China)
- National Institute of Advanced Industrial Science and Technology (AIST), Fukushima (Japan); Univ. of Tokyo (Japan)
While the exfoliation of almost all layered materials results in a monolayer with the same atomic geometry as its bulk counterpart, the exfoliation of PdSe2 results in a monolayer with a different atomic geometry and a new stoichiometry, Pd2Se3, which is a fusion of two PdSe2 monolayers mediated by Se emission. Here we first report first-principles calculations of lateral junctions between a PdSe2 bilayer and a Pd2Se3 monolayer. In this work, we find that, while several distinct junction geometries are possible, they all exhibit empty interface states below the conduction band. As a result, light n-type doping of either or both sides, e.g. by halogen atoms replacing Se atoms, leads to a remotely-doped interface, i.e. a 1D conducting nanowire that runs along the junction, in between the two semiconductors. We have fabricated such junctions inside a scanning transmission electron microscope (STEM), but doping and transport measurements are not currently practical.
- Research Organization:
- Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Japan Science and Technology Agency (JST); Japan Society for the Promotion of Science (JSPS)
- Grant/Contract Number:
- FG02-09ER46554; JP16H06333; P16823
- OSTI ID:
- 1597894
- Journal Information:
- 2D Materials, Vol. 5, Issue 3; ISSN 2053-1583
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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