Carrier control and transport modulation in GaSb/InAsSb core/shell nanowires

Summary, in English

We report transport studies of GaSb/InAs core/shell nanowires. It is shown that with increasing InAs shell thickness, it is possible to tune the carrier concentrations and transport in the structures from p-type (core-dominated) to n-type (shell dominated). For nanowires with an intermediate shell thickness (5-7 nm), we show that the transport is ambipolar, such that an applied top-gate potential can provide further control of carrier type and transport path. In this range, the nature of the GaSb-InAs junction also changes from broken gap (semimetal) to staggered (narrow bandgap) with a small decrease in shell thickness. From a device point of view, we demonstrate that the presence of a thin (<3 nm) InAs shell improves p-type GaSb nanowire transistor characteristics. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749283]

• Författare: Bahram Ganjipour; Martin Ek; Mattias Borg; Kimberly Dick Thelander; Mats-Erik Pistol; Lars-Erik Wernersson; Claes Thelander
• Avdelning/ar: Fasta tillståndets fysik; Centrum för analys och syntes; Institutionen för elektro- och informationsteknik; NanoLund: Centre for Nanoscience
• Publiceringsår: 2012
• Språk: Engelska
• Publikation/Tidskrift/Serie: Applied Physics Letters
• Volym: 101
• Issue: 10
• Länkar: http://dx.doi.org/10.1063/1.4749283
• Dokumenttyp: Artikel i tidskrift
• Förlag: American Institute of Physics (AIP)
• Ämne: Condensed Matter Physics
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0003-6951