InAs/GaSb Heterostructure Nanowires for Tunnel Field-Effect Transistors.

Summary, in English

InAs/GaSb nanowire heterostructures with thin GaInAs inserts were grown by MOVPE and characterized by electrical measurements and transmission electron microscopy. Down-scaling of the insert thickness was limited because of an observed sensitivity of GaSb nanowire growth to the presence of In. By employing growth interrupts in between the InAs and GaInAs growth steps it was possible to reach an insert thickness down to 25 nm. Two-terminal devices show a diode behavior, where temperature-dependent measurements indicate a heterostructure barrier height of 0.5 eV, which is identified as the valence band offset between the InAs and GaSb. Three-terminal transistor structures with a top-gate positioned at the heterointerface show clear indications of band-to-band tunnelling.

• Author: Mattias Borg; Kimberly Dick Thelander; Bahram Ganjipour; Mats-Erik Pistol; Lars-Erik Wernersson; Claes Thelander
• Department/s: Solid State Physics; Department of Electrical and Information Technology; NanoLund: Centre for Nanoscience
• Publishing year: 2010
• Language: English
• Pages: 4080-4085
• Publication/Series: Nano Letters
• Volume: 10
• Issue: Online August 24, 2010
• Links: http://dx.doi.org/10.1021/nl102145h
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Topic: Nano Technology; Condensed Matter Physics
• Status: Published
• Research group: Nano
• ISBN/ISSN/Other: ISSN: 1530-6992