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@ARTICLE{Boussinot:201464,
author = {Boussinot, G. and Brener, Efim},
title = {{I}nterface kinetics in phase-field models: {I}sothermal
transformations in binary alloys and step dynamics in
molecular-beam epitaxy},
journal = {Physical review / E},
volume = {88},
number = {2},
issn = {1539-3755},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-03759},
pages = {022406},
year = {2013},
abstract = {We present a unified description of interface kinetic
effects in phase-field models for isothermal transformations
in binary alloys and steps dynamics in
molecular-beam-epitaxy. The phase-field equations of motion
incorporate a kinetic cross-coupling between the phase field
and the concentration field. This cross-coupling generalizes
the phenomenology of kinetic effects and was omitted until
recently in classical phase-field models. We derive general
expressions (independent of the details of the phase-field
model) for the kinetic coefficients within the corresponding
macroscopic approach using a physically motivated reduction
procedure. The latter is equivalent to the so-called
thin-interface limit but is technically simpler. It involves
the calculation of the effective dissipation that can be
ascribed to the interface in the phase-field model. We
discuss in detail the possibility of a nonpositive definite
matrix of kinetic coefficients, i.e., a negative effective
interface dissipation, although being in the range of
stability of the underlying phase-field model. Numerically
we study the step-bunching instability in
molecular-beam-epitaxy due to the Ehrlich-Schwoebel effect,
present in our model due to the cross-coupling. Using the
reduction procedure we compare the results of the
phase-field simulations with the analytical predictions of
the macroscopic approach.},
cin = {PGI-2},
ddc = {530},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {421 - Frontiers of charge based Electronics (POF2-421)},
pid = {G:(DE-HGF)POF2-421},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000323576400009},
doi = {10.1103/PhysRevE.88.022406},
url = {https://juser.fz-juelich.de/record/201464},
}