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@ARTICLE{Degtyarev:829764,
author = {Degtyarev, V. E. and Khazanova, S. V. and Demarina,
Nataliya},
title = {{F}eatures of electron gas in {I}n{A}s nanowires imposed by
interplay between nanowire geometry, doping and surface
states},
journal = {Scientific reports},
volume = {7},
number = {1},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2017-03398},
pages = {3411},
year = {2017},
abstract = {We present a study of electron gas properties in InAs
nanowires determined by interaction between nanowire
geometry, doping and surface states. The electron gas
density and space distribution are calculated via
self-consistent solution of coupled Schroedinger and Poisson
equations in the nanowires with a hexagonal cross-section.
We show that the density of surface states and the nanowire
width define the spatial distribution of the electrons.
Three configurations can be distinguished, namely the
electrons are localized in the center of the wire, or they
are arranged in a uniform tubular distribution, or finally
in a tubular distribution with additional electron
accumulation at the corners of the nanowire. The latter one
is dominating for most experimentally obtained nanowires.
N-type doping partly suppresses electron accumulation at the
nanowire corners. The electron density calculated for both,
various nanowire widths and different positions of the Fermi
level at the nanowire surface, is compared with the
experimental data for intrinsic InAs nanowires. Suitable
agreement is obtained by assuming a Fermi level pinning at
60 to 100 meV above the conduction band edge, leading to a
tubular electron distribution with accumulation along the
corners of the nanowire.},
cin = {PGI-2},
ddc = {000},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28611438},
UT = {WOS:000403140000082},
doi = {10.1038/s41598-017-03415-3},
url = {https://juser.fz-juelich.de/record/829764},
}