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GFET Asymmetric Transfer Response Analysis through Access Region Resistances.

Alejandro Toral-Lopez1, Enrique G Marin2,3, Francisco Pasadas4

  • 1Departamento de Electrónica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain. atoral@ugr.es.

Nanomaterials (Basel, Switzerland)
|July 21, 2019
PubMed
Summary
This summary is machine-generated.

Access regions significantly impact graphene field-effect transistor (GFET) performance in radio-frequency electronics. Optimizing these regions is crucial for enhancing GFETs for advanced RF applications.

Keywords:
GFETRFaccess region

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Semiconductor Physics

Background:

  • Graphene field-effect transistors (GFETs) are explored to enhance radio-frequency (RF) electronics, complementing silicon and III-V technologies.
  • Current research focuses on high-mobility graphene samples, often overlooking the critical role of access regions in device performance.

Purpose of the Study:

  • To investigate the impact of access regions on GFET transfer characteristics and RF performance.
  • To analyze how back-gate modulation and graphene imperfections affect GFET behavior.
  • To evaluate the suitability of GFETs for RF applications by assessing their cut-off frequency.

Main Methods:

  • Detailed numerical simulations of GFETs.
  • Analysis of GFET transfer response under varying access region conductivity.
  • Investigation of the effects of graphene imperfections like charge puddles.
  • Evaluation of GFET cut-off frequency for RF application assessment.

Main Results:

  • Access regions significantly influence GFET transfer response, contributing to asymmetric saturation.
  • Modulating access region conductivity and the presence of charge puddles alter the transfer characteristics.
  • The study provides insights into optimizing GFETs for RF applications by considering access region effects.

Conclusions:

  • Access regions are critical for GFET performance, impacting their use in RF electronics.
  • Understanding and controlling access regions, along with graphene quality, is essential for realizing high-performance GFETs.
  • Further research into access region engineering can unlock the full potential of GFETs in RF applications.