Nature of heterointerfaces in GaAs/InAs and InAs/GaAs axial nanowire heterostructures
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Authors
Paladugu, Mohanchand
Zou, Jin
Guo, Ya-Nan
Zhang, Xin
Kim, Yong
Joyce, Hannah J.
Gao, Qiang
Tan, Hark Hoe
Jagadish, C.
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American Institute of Physics (AIP)
Abstract
The structural and compositional characteristics of heterointerfaces of Au-catalyzed GaAs/InAs and InAs/GaAs axial nanowireheterostructures were comprehensively investigated by transmission electron microscopy. It has been found that the GaAs/InAs interface is not sharp and contains an InGaAs transition segment, and in contrast, the InAs/GaAs interface is atomically sharp. This difference in the nature of heterointerfaces can be attributed to the difference in the affinity of the group III elements with the catalyst material.
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Applied Physics Letters