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New Method to Determine the Schottky Barrier in Few-Layer Black Phosphorus Metal Contacts

New Method to Determine the Schottky Barrier in Few-Layer Black Phosphorus Metal Contacts
Lee, Su YeongYun, Won SeokLee, J. D.
Issued Date
ACS Applied Materials & Interfaces, v.9, no.8, pp.7873 - 7877
Augmented Wave MethodBand UnfoldingBlack Phosphorus Metal ContactsCalculationsContact PolarityElectron AffinityElectronic PropertiesElectronic StructureField Effect TransistorsFirst Principles CalculationInterfacesMetal ContactsMetalsMobilityMonolayerNew MethodPhosphorusScandiumSchottky Barrier DiodesSchottky Barrier HeightSchottky Barrier HeightsSemiconductorSemiconductor Metal Boundaries
Schottky barrier height and carrier polarity are seminal concepts for a practical device application of the interface between semiconductor and metal electrode. Investigation of those concepts is usually made by a conventional method such as the Schottky-Mott rule, incorporating the metal work function and semiconductor electron affinity, or the Fermi level pinning effect, resulting from the metal-induced gap states. Both manners are, however, basically applied to the bulk semiconductor metal contacts. To explore few-layer black phosphorus metal contacts far from the realm of bulk, we propose a new method to determine the Schottky barrier by scrutinizing the layer-by-layer phosphorus electronic structure from the first-principles calculation combined with the state-of-the-art band unfolding technique. In this study, using the new method, we calculate the Schottky barrier height and determine the contact polarity of Ti, Sc, and Al metal contacts to few-layer (mono-, bi-, tri-, and quadlayer) black phosphorus. This gives a significant physical insight toward the utmost layer-by-layer manipulation of electronic properties of few-layer semiconductor metal contacts. © 2017 American Chemical Society.
American Chemical Society
Related Researcher
  • 이재동 Lee, JaeDong 화학물리학과
  • Research Interests Theoretical Condensed Matter Physics; Ultrafast Dynamics and Optics; Nonequilibrium Phenomena
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Appears in Collections:
Department of Physics and Chemistry Light and Matter Theory Laboratory 1. Journal Articles
Division of Nanotechnology 1. Journal Articles


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