TY - GEN
T1 - Nonparabolicity effects of the ultra-thin body double-gate MOSFETs
AU - Lou, Haijun
AU - Zhu, Yunxi
AU - Zhang, Lining
AU - Lin, Xinnan
AU - Wu, Jiazhen
AU - Liu, Zhiwei
AU - Wang, Guozeng
AU - Zhang, Yang
AU - Wu, Wen
AU - Zhao, Xiaojin
AU - Wang, Wenping
AU - Wang, Ruonan
AU - Ma, Yong
AU - He, Jin
AU - Chan, Mansun
PY - 2011
Y1 - 2011
N2 - In this paper, the band-structure of ultra-thin body (UTB) double-gate (DG) MOSFETs is calculated by empirical tight-binding model, and the the nonparabolicity effects are included in the model by the modified Schrödinger equation with the fitting parameters which are extracted from the band-structure by expanding the dispersion relationship in a power series up to the third order. The characteristics of UTB-DG MOSFET current are simulated and the results are compared by the non-equilibrium Green's function (NEGF) transport theory based on effective mass approximation (EMA), parabolic quantum-confined masses (PQM) and nonparabolicity effect model (NPE). It is shown that the saturation current is overestimated in the models based on EMA and PQM compared with the model including NPE, and the value rises to 4% when Tsi equals to 3nm. The difference between NPE model and PQM model increases with increment of Vg, but less sensitive to Vds.
AB - In this paper, the band-structure of ultra-thin body (UTB) double-gate (DG) MOSFETs is calculated by empirical tight-binding model, and the the nonparabolicity effects are included in the model by the modified Schrödinger equation with the fitting parameters which are extracted from the band-structure by expanding the dispersion relationship in a power series up to the third order. The characteristics of UTB-DG MOSFET current are simulated and the results are compared by the non-equilibrium Green's function (NEGF) transport theory based on effective mass approximation (EMA), parabolic quantum-confined masses (PQM) and nonparabolicity effect model (NPE). It is shown that the saturation current is overestimated in the models based on EMA and PQM compared with the model including NPE, and the value rises to 4% when Tsi equals to 3nm. The difference between NPE model and PQM model increases with increment of Vg, but less sensitive to Vds.
KW - Effective mass approximation
KW - Non-equilibrium green's function
KW - Nonparabolicity effects
KW - Parabolic quantum-confined masses
KW - Ultra-thin body
UR - https://www.scopus.com/pages/publications/81455143116
M3 - Conference Paper published in a book
AN - SCOPUS:81455143116
SN - 9781439871393
T3 - Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
SP - 667
EP - 670
BT - Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
T2 - Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
Y2 - 13 June 2011 through 16 June 2011
ER -