Electrical properties of InAs1−xSbx and InSb nanowires grown by molecular beam epitaxy

Results of electrical characterization of Au nucleated InAs₁ˍₓSbₓnanowiresgrown by molecular beam epitaxy are reported. An almost doubling of the extracted field effect mobility compared to reference InAsnanowires is observed for a Sb content of x = 0.13. Pure InSbnanowires on the other hand show considerably lower, and strongly diameter dependent, mobility values. Finally, InAs of wurtzite crystal phase overgrown with an InAs₁ˍₓSbₓ shell is found to have a substantial positive shift in threshold voltage compared to reference nanowires.This work received financial support from the Nanometer Structure Consortium at Lund University (nmC@LU), the Swedish Research Council (VR), the Swedish Foundation for Strategic Research (SSF), and the Knut and Alice Wallenberg Foundation (KAW). It also received financial support from the French National Research Agency (ANR), TERADOT project, under Contract No.ANR-11-JS04-002-01