Electronic and Transport Property of Phosphorene Nanoribbon

By combining density functional theory and nonequilibrium Green's function, we study the electronic and transport properties of monolayer black phosphorus nanoribbons (PNRs). First, we investigate the band-gap of PNRs and its modulation by the ribbon width and an external transverse electric fe...

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Bibliographic Details
Published in:arXiv.org 2015-07
Main Authors: Wu, Qingyun, Shen, Lei, Yang, Ming, Huang, Zhigao, Feng, Yuan Ping
Format: Article
Language:English
Subjects:
Bias
Carrier transport
Channels
Density functional theory
Graphene
Green's functions
Mathematical analysis
Nanoribbons
Phosphorene
Stark effect
Transport properties
Two dimensional materials
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Summary:By combining density functional theory and nonequilibrium Green's function, we study the electronic and transport properties of monolayer black phosphorus nanoribbons (PNRs). First, we investigate the band-gap of PNRs and its modulation by the ribbon width and an external transverse electric feld. Our calculations indicate a giant Stark effect in PNRs, which can switch on transport channels of semiconducting PNRs under low bias, inducing an insulator-metal-transition. Next, we study the transport channels in PNRs via the calculations of the current density and local electron transmission pathway. In contrast to graphene and MoS_2 nanoribbons, the carrier transport channels under low bias are mainly located in the interior of both armchair and zigzag PNRs, and immune to a small amount of edge defects. Lastly, a device of the PNR-based dual-gate feld-effect-transistor, with high on/off-ratio of 10^3, is proposed based on the giant electric feld tuning effect.
ISSN:2331-8422