Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 67, Issue 9, Pages 3585-3591Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2020.3006821
Keywords
Band-to-band tunneling (BBT); intraband tunneling; static random access memory (SRAM); thermionic emission
Funding
- Department of Science and Technology, Government of India, under Innovation in Science Pursuit for Inspired Research (INSPIRE) Scheme [DST/INSPIRE/04/2016/000032]
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A lattice matched heterojunction intraband tunnel (HJIBT) FET is proposed. The performance dependence of the device on conduction band (CB) discontinuity at source-channel and drain-channel interface is addressed using numerical simulation. Various mechanisms governing transport phenomena in the HJIBT FET are investigated in detail for different CB offsets (CBOs). For low gate to source voltage (V-GS), thermionic emission is found to be the most significant transport mechanism. For moderate V-GS, intraband tunneling phenomenon dominates over thermionic emission and continues to remain so. At high V-GS, band-to-band tunneling occurs in HJIBT FETs. The proposed device shows improved figures of merit such as drain-induced barrier lowering(DIBL), ON-current (I-ON) to OFF-current (I-OFF) ratio (I-ON/I-OFF), subthreshold slope (SS), gate capacitance (CG), g(m) (transconductance), and f(T) (cut-off frequency), with respect to conventional MOSFET. Also, the design of a high-performance hybrid 6T-static random access memory (SRAM) is proposed.
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