Correlation between Electrical Transport and Nanoscale Strain in InAs/In0.6Ga0.4As Core-Shell Nanowires

Zeng, Lunjie,1983Chalmers tekniska högskola,Chalmers University of Technology (författare)

Free-standing semiconductor nanowires constitute an ideal material system for the direct manipulation of electrical and optical properties by strain engineering. In this study, we present a direct quantitative correlation between electrical conductivity and nanoscale lattice strain of individual InAs nanowires passivated with a thin epitaxial In0.6Ga0.4As shell. With an in situ electron microscopy electromechanical testing technique, we show that the piezoresistive response of the nanowires is greatly enhanced compared to bulk InAs, and that uniaxial elastic strain leads to increased conductivity, which can be explained by a strain-induced reduction in the band gap. In addition, we observe inhomogeneity in strain distribution, which could have a reverse effect on the conductivity by increasing the scattering of charge carriers. These results provide a direct correlation of nanoscale mechanical strain and electrical transport properties in free-standing nanostructures.

Gammer, ChristophErich Schmid Institute of Materials Science (ESI) (författare)
Ozdol, BurakLawrence Berkeley National Laboratory (författare)
Nordqvist, ThomasNiels Bohr Institute (författare)
Nygard, J.Niels Bohr Institute (författare)
Krogstrup, P.Niels Bohr Institute (författare)
Minor, Andrew M.University of California,Lawrence Berkeley National Laboratory (författare)
Jäger, Wolfgang,1948Chalmers tekniska högskola,Chalmers University of Technology,Christian-Albrechts-Universität zu Kiel,University of Kiel(Swepub:cth)jagerw (författare)
Olsson, Eva,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f10eva (författare)
Chalmers tekniska högskolaErich Schmid Institute of Materials Science (ESI) (creator_code:org_t)

Ingår i:Nano Letters: American Chemical Society (ACS)18:8, s. 4949-49561530-69921530-6984

Av författaren/redakt...: Zeng, Lunjie, 19 ...; Gammer, Christop ...; Ozdol, Burak; Nordqvist, Thoma ...; Nygard, J.; Krogstrup, P.; visa fler...; Minor, Andrew M.; Jäger, Wolfgang, ...; Olsson, Eva, 196 ...; visa färre...

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