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

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

Gammer, Christoph (author): Erich Schmid Institute of Materials Science (ESI)

Minor, Andrew M. (author): University of California,Lawrence Berkeley National Laboratory

Jäger, Wolfgang, 1948 (author): Chalmers tekniska högskola,Chalmers University of Technology,Christian-Albrechts-Universität zu Kiel,University of Kiel

Olsson, Eva, 1960 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2018-07-25
2018
English.
In: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 18:8, s. 4949-4956

Related links:: https://pubs.acs.org...; show more...; https://doi.org/10.1...; https://research.cha...; https://research.cha...; show less...

Abstract Subject headings

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.

NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

By the author/editor: Zeng, Lunjie, 19 ...; Gammer, Christop ...; Ozdol, Burak; Nordqvist, Thoma ...; Nygard, J.; Krogstrup, P.; show more...; Minor, Andrew M.; Jäger, Wolfgang, ...; Olsson, Eva, 196 ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Analytical Chemi ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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