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@ARTICLE{Rieger:138771,
author = {Rieger, Torsten and Lepsa, Mihail Ion and Schäpers, Thomas
and Grützmacher, Detlev},
title = {{C}ontrolled wurtzite inclusions in self-catalyzed zinc
blende {III}–{V} semiconductor nanowires},
journal = {Journal of crystal growth},
volume = {378},
issn = {0022-0248},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2013-04855},
pages = {506 - 510},
year = {2013},
abstract = {The control of the Ga droplet during the MBE growth and its
impact on the crystal structure of self-catalyzed GaAs
nanowires (NWs) were investigated. The consumption of the
droplet proceeds in two steps. First, the contact angle
decreases to 90° keeping the NW diameter constant. The
crystal structure changes from zinc blende (ZB) to wurtzite
(WZ). Then, the contact angle keeps constant while the top
radius of the NW decreases and the NW grows again in ZB
configuration. During the last step, {110}, {211}B and {100}
facets develop at the top. Calculations show that the Ga
desorption from the droplet has to be taken into account
during its consumption. With this information, several WZ
segments of different lengths were placed into ZB GaAs NWs
via partial droplet consumption. For this purpose, we
supplied As and Ga separately, in order to partially consume
and refill the Ga droplet. The same mechanism was applied to
self-catalyzed InAs NWs resulting in short WZ segments
inserted in a ZB twinning superlattice.},
cin = {PGI-9 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
pnm = {421 - Frontiers of charge based Electronics (POF2-421)},
pid = {G:(DE-HGF)POF2-421},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000323355900125},
doi = {10.1016/j.jcrysgro.2012.12.035},
url = {https://juser.fz-juelich.de/record/138771},
}