Open AccessDesign and investigation of negative capacitance–based core‐shell dopingless nanotube tunnel field‐effect transistor
Author(s) -
Kumar Naveen,
Amin S. Intekhab,
Anand Sunny
Publication year - 2021
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/cds2.12064
Subject(s) - materials science , tunnel field effect transistor , ferroelectricity , negative impedance converter , transistor , capacitance , subthreshold slope , field effect transistor , optoelectronics , dielectric , lead zirconate titanate , voltage , condensed matter physics , electrical engineering , electrode , physics , voltage source , engineering , quantum mechanics
Abstract Investigation and analysis of a ferroelectric material–based dopingless nanotube tunnel field‐effect transistor are conducted using a lead zirconate titanate (PZT) gate stack to induce negative capacitance in the device. Landau–Khalatnikov equations are used in deriving the parameter values of the ferroelectric material to ensure accurate results. The nanotube structure of the tunnel field‐effect transistor allows for better electrostatic control owing to its gate‐all‐around structure. Incorporation of negative capacitance further reduces the voltage supply requirement and power consumption of the structure while simultaneously improving switching. In addition, the device is studied for varying thicknesses of the dielectric PZT material. The threshold voltage of the device under study was calculated as 0.281 V, and the average subthreshold slope of the device was reduced to 18.271 mV/decade, far below the thermionic limit of 60 mV/decade.