Template-assisted selective area growth techniques have gained popularity for their ability to grow epitaxial materials in prefabricated dielectric templates. Confined epitaxial lateral overgrowth (CELO) is one such technique that uses dielectric templates to define the geometry of the grown nanostructures. Two terminal low-temperature magneto-transport measurements were used to determine electronic properties. For doped In0.53Ga0.47As CELO nanostructures, we observe Shubnikov–De Hass oscillations in the longitudinal magnetoresistance and utilize these to estimate effective mass, carrier density, and mobilities. This analysis both reveals the presence of defects in these nanostructures and material variabilities between growth runs. Electron beam lithography and contact deposition for transport measurements were enabled by parasitic growth removal. In the future, this approach can enable other material systems to be explored for confined lateral epitaxy, improve material quality, and investigate a variety of quantum transport phenomenon in such nanoscale devices.
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28 August 2021
Research Article|
August 25 2021
Confined lateral epitaxial overgrowth of InGaAs: Mechanisms and electronic properties
Aranya Goswami
;
Aranya Goswami
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Brian Markman;
Brian Markman
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Simone T. Šuran Brunelli;
Simone T. Šuran Brunelli
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Shouvik Chatterjee
;
Shouvik Chatterjee
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Jonathan Klamkin;
Jonathan Klamkin
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Mark Rodwell;
Mark Rodwell
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
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Chris J. Palmstrøm
Chris J. Palmstrøm
a)
1
Department of Electrical and Computer Engineering, University of California Santa Barbara
, Santa Barbara, California 93106, USA
2
Department of Materials, University of California Santa Barbara
, Santa Barbara, California 93106, USA
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 130, 085302 (2021)
Article history
Received:
March 18 2021
Accepted:
August 10 2021
Citation
Aranya Goswami, Brian Markman, Simone T. Šuran Brunelli, Shouvik Chatterjee, Jonathan Klamkin, Mark Rodwell, Chris J. Palmstrøm; Confined lateral epitaxial overgrowth of InGaAs: Mechanisms and electronic properties. J. Appl. Phys. 28 August 2021; 130 (8): 085302. https://doi.org/10.1063/5.0050802
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