Journal Article

PreJuSER-21111

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png New method of creation of a rearrangeable local Coulomb potential profile and its application for investigations of local conductivity of InAs nanowires

Zhukov, A. A. ; Volk, C.FZJ* ; Winden, A.FZJ* ; Hardtdegen, H.FZJ* ; Schäpers, T.FZJ*

2011
North-Holland, Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.physe.2011.11.010

Abstract: We present a new technique to create a reconfigurable Coulomb potential profile. The potential profile on the sample surface covered with residual polymethyl methacrylate (PMMA) layer as charge accumulation substance is performed with a low DC voltage applied to conductive probe tip of scanning microscope. To characterize the resulted Coulomb potential profile Kelvin probe technique is used. The effectiveness of this method is demonstrated by performing measurements of the local conductivity of InAs quantum wires. These investigations revealed an inhomogeneous conductivity of the wires and the formation of a potential barrier in the wire at the contact pad interface when the electronic system of the wire is depleted. (C) 2011 Elsevier B.V. All rights reserved.

Keyword(s): J

Note: This work is supported by Russian Foundation for Basic Research, programs of the Russian Academy of Science, the Program for Support of Leading scientific Schools, and by DFG within the project RUS 09/052.

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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