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@ARTICLE{Privitera:867956,
author = {Privitera, S. M. S. and Mio, A. M. and Dück, M. and
Persch, C. and Zimbone, M. and Wuttig, Matthias and Rimini,
E.},
title = {{A}tomic disordering processes in crystalline {G}e{T}e
induced by ion irradiation},
journal = {Journal of physics / D Applied physics D},
volume = {51},
number = {49},
issn = {1361-6463},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2019-06549},
pages = {495103 -},
year = {2018},
abstract = {The damaging process of GeTe up to amorphization has been
studied by introducing controlled levels of disorder by
irradiation with 150 keV Ar+ ions. In situ reflectivity
measurements and ex-situ resistance and Raman spectroscopy
analysis have been employed to study the impact of ion
bombardment on the electrical conduction properties and on
the bonding. The results obtained are indicative for three
different stages of film damage. The first step appears to
be dominated by point defects, affecting the temperature
coefficient of resistance (TCR) and inducing a transition
from positive (metallic conduction) to negative TCR values
(conduction dominated by localized states), whilst the
material still remains crystalline. The second step is
characterized by the annealing of the defects induced,
presumably, by the formation of complex defects that act as
sinks for point defect recombination. This process is
facilitated by the high atomic mobility. The third phase of
damage starts at a fluence of 3.5 × 1014 cm−2
and finally converts the material to the amorphous state,
characterized by higher resistance and decreased optical
reflectivity. The modifications observed upon ion
irradiation provide important insights into the possible
states that can be achieved in crystalline GeTe through
different local atomic arrangements towards amorphization.},
cin = {PGI-10},
ddc = {530},
cid = {I:(DE-Juel1)PGI-10-20170113},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000460046100001},
doi = {10.1088/1361-6463/aae4ae},
url = {https://juser.fz-juelich.de/record/867956},
}