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Tuning Hole Mobilit...
Tuning Hole Mobility of Individual p-Doped GaAs Nanowires by Uniaxial Tensile Stress
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- Zeng, Lunjie, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Holmér, Jonatan, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Dhall, Rohan (författare)
- Lawrence Berkeley National Laboratory
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- Gammer, Christoph (författare)
- Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences
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- Minor, Andrew M. (författare)
- Lawrence Berkeley National Laboratory,University of California at Berkeley
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- Olsson, Eva, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2021-04-29
- 2021
- Engelska.
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Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 21:9, s. 3894-3900
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://pubs.acs.org...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Strain engineering provides an effective way of tailoring the electronic and optoelectronic properties of semiconductor nanomaterials and nanodevices, giving rise to novel functionalities. Here, we present direct experimental evidence of strain-induced modifications of hole mobility in individual gallium arsenide (GaAs) nanowires, using in situ transmission electron microscopy (TEM). The conductivity of the nanowires varied with applied uniaxial tensile stress, showing an initial decrease of similar to 5-20% up to a stress of 1-2 GPa, subsequently increasing up to the elastic limit of the nanowires. This is attributed to a hole mobility variation due to changes in the valence band structure caused by stress and strain. The corresponding lattice strain in the nanowires was quantified by in situ four dimensional scanning TEM and showed a complex spatial distribution at all stress levels. Meanwhile, a significant red shift of the band gap induced by the stress and strain was unveiled by monochromated electron energy loss spectroscopy.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- strain engineering
- hole transport
- phonon scattering
- GaAs nanowires
- band shift
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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