Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 57, Issue 8, Pages 1883-1888Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2010.2051249
Keywords
Core-shell; nanowire (NW); silicon-germanium; tunneling field-effect transistor (TFET)
Funding
- DARPA [HR0011-08-1-0050]
- NSF [DMR-0846573, DMR-0819860]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [819860] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0846573] Funding Source: National Science Foundation
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We report the fabrication and experimental investigation of Ge-SixGe1-x core-shell nanowire (NW) tunneling field-effect transistors (TFETs), consisting of p-i-n device structures realized by low-energy ion implantation. We investigate the NW TFET device characteristics as a function of drain doping, channel length, and temperature. Our devices show ON-state currents of up to I-ON similar to 5 mu A/mu m, with an ambipolar behavior that can be suppressed by varying the drain doping concentration. The subthreshold swing of NW TFETs shows little temperature dependence down to 77 K, consistent with band-to-band tunneling as being the dominant carrier injection mechanism.
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