期刊
IEEE TRANSACTIONS ON ELECTRON DEVICES
卷 55, 期 11, 页码 2939-2945出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2008.2005173
关键词
Bandstructure; effective mass; InAs nanowire field-effect transistors (NWFETs); InSb NWFETs; k.p method; NWs
资金
- Semiconductor Research Corporation Focus Center Research Program on Nano Materials (FENA)
The electronic structure of highly scaled InSb and InAs nanowire (NW) field-effect transistors (FETs) is calculated with an eight-band k.p model. Cross sections of 4 nm or less result in bandgaps of 0.8 eV or more. For these cross sections, all devices are single moded and operate in the quantum capacitance limit. Analytical expressions for the transconductance, cutoff frequency, and gate delay time are presented and compared to numerical results. The dependence of the intrinsic cutoff frequency on drive current is weak, scaling as root ID with values in the 4-7 THz range that are good for RF applications. The gate delay times strongly depend on the drive current, scaling as I-D(-3/2) with values ranging from 25 to 132 fs which are competitive for digital applications.
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