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@ARTICLE{Heedt:256461,
author = {Heedt, Sebastian and Otto, Isabel and Sladek, Kamil and
Hardtdegen, Hilde and Schubert, Jürgen and Demarina,
Nataliya and Lüth, Hans and Grützmacher, Detlev and
Schäpers, Thomas},
title = {{R}esolving ambiguities in nanowire field-effect transistor
characterization},
journal = {Nanoscale},
volume = {7},
number = {43},
issn = {2040-3372},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-06368},
pages = {18188 - 18197},
year = {2015},
abstract = {We have modeled InAs nanowires using finite element methods
considering the actual device geometry, the semiconducting
nature of the channel and surface states, providing a
comprehensive picture of charge distribution and gate
action. The effective electrostatic gate width and screening
effects are taken into account. A pivotal aspect is that the
gate coupling to the nanowire is compromised by the
concurrent coupling of the gate electrode to the
surface/interface states, which provide the vast majority of
carriers for undoped nanowires. In conjunction with
field-effect transistor (FET) measurements using two gates
with distinctly dissimilar couplings, the study reveals the
density of surface states that gives rise to a shallow
quantum well at the surface. Both gates yield identical
results for the electron concentration and mobility only at
the actual surface state density. Our method remedies the
flaws of conventional FET analysis and provides a
straightforward alternative to intricate Hall effect
measurements on nanowires.},
cin = {PGI-9 / JARA-FIT},
ddc = {600},
cid = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000364048900025},
doi = {10.1039/C5NR03608A},
url = {https://juser.fz-juelich.de/record/256461},
}