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Zhao, Peng; Khosravi, Ava; Azcatl, Angelica; Bolshakov, Pavel; Hinkle, Christopher L; Wallace, Robert M; Young, Chadwin D; Mirabelli, Gioele; Caruso, Enrico; Hurley, Paul K, E-mail: chadwin.young@utdallas.edu2018
AbstractAbstract
[en] Border traps and interface traps in HfO2/few-layer MoS2 top-gate stacks are investigated by C–V characterization. Frequency dependent C–V data shows dispersion in both the depletion and accumulation regions for the MoS2 devices. The border trap density is extracted with a distributed model, and interface traps are analyzed using the high-low frequency and multi-frequency methods. The physical origins of interface traps appear to be caused by impurities/defects in the MoS2 layers, performing as band tail states, while the border traps are associated with the dielectric, likely a consequence of the low-temperature deposition. This work provides a method of using multiple C–V measurements and analysis techniques to analyze the behavior of high-k/TMD gate stacks and deconvolute border traps from interface traps. (letter)
Source
Available from http://dx.doi.org/10.1088/2053-1583/aab728; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
2D Materials; ISSN 2053-1583;
; v. 5(3); [8 p.]

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