Design and performance analysis of heterojunction dual wire gate all around nanosheet field effect transistor

In this paper, we introduce a new variation of the Gate All Around Nanosheet Field Effect Transistor (GAA NS FET) called the Dual Wire (DW), which integrates source heterojunctions and strained channels. We assess its electrical properties across different temperatures (300K, 400K, and 500K) and compare them to those of the Heterojunction DW Gate All Around Nanosheet Field Effect Transistor (Heterojunction DW GAA NS FET) and the Conventional DW Gate All Around Nanosheet Field Effect Transistor (Conventional DW GAA NS FET). Our investigation encompasses the electrostatic control effects on DC and analog parameters, including gate capacitance ( ), transconductance ( ), and cut-off frequency ( ) for all three device types. The channel regions in our structures feature Silicon Germanium (SiGe) (Si/Ge/Si), and the introduction of strain and a heterojunction structure notably enhances device performance. To analyze the semiconductor device accurately, we solve the Density Gradient (DG) equation self-consistently, utilizing the Shockley-Read-Hall (SRH) equation to estimate carrier generation, considering bandgap narrowing in transport behavior, and accounting for auger recombination. Additionally, at temperatures of 300K, 400K, and 500K, the Heterojunction DW GAA NS FET exhibits substantial improvement in and compared to the Conventional DW GAA NS FET. Overall, our results show a notable improvement in drain current, transconductance, and unity-gain frequency, with enhancements of around 34%, 9.5%, and 30%, respectively, observed across different temperatures. This improvement translates into superior RF performance for the Heterojunction DW GAA NS FET when compared to the conventional DW GAA NS FET.