Subsurface imaging of coupled carrier transport in GaAs/AlGaAs core-shell nanowires

Abstract

We demonstrate spatial probing of carrier transport within GaAs/AlGaAs core-shell nanowires with nanometer lateral resolution and subsurface sensitivity by energy-variable electron beam induced current imaging. Carrier drift that evolves with applied electric field is distinguished from a coupled drift-diffusion length. Along with simulation of injected electron trajectories, combining beam energy tuning with precise positioning for selective probing of core and shell reveals axial position- and bias-dependent differences in carrier type and transport along parallel conduction channels. These results indicate how analysis of transport within heterostructured nanomaterials is no longer limited to nonlocal or surface measurements.


Autore Pugliese

Tutti gli autori

  • Chen G.; McGuckin T.; Hawley C.J.; Gallo E.M.; Prete P.; Miccoli I.; Lovergine N.; Spanier J.E.

Titolo volume/Rivista

Nano letters


Anno di pubblicazione

2015

ISSN

1530-6992

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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