@Article{ElderAchGraYinAla:2017:StHoTw,
author = "Elder, K. R. and Achim, C. V. and Granato, Enzo and Ying, S. C.
and Ala-Nissila, T.",
affiliation = "{Oakland Universit} and {University of Concepci{\'o}n} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Brown
University} and {Aalto University School of Science}",
title = "Striped, honeycomb, and twisted moir{\'e} patterns in surface
adsorption systems with highly degenerate commensurate ground
states",
journal = "Physical Review B",
year = "2017",
volume = "96",
number = "19",
pages = "195439",
keywords = "Adsorbed Systems, Computer Simulations, phase field crystal
model.",
abstract = "Atomistically thin adsorbate layers on surfaces with a lattice
mismatch display complex spatial patterns and ordering due to
strain-driven self-organization. In this work, a general formalism
to model such ultrathin adsorption layers that properly takes into
account the competition between strain and adhesion energy of the
layers is presented. The model is based on the amplitude expansion
of the two-dimensional phase field crystal (PFC) model, which
retains atomistic length scales but allows relaxation of the
layers at diffusive time scales. The specific systems considered
here include cases where both the film and the adsorption
potential can have either honeycomb (H) or triangular (T)
symmetry. These systems include the so-called (1 × 1), (\√3
× \√3) R30\◦, (2 × 2), (\√7 × \√7)
R19.1\◦, and other higher order states that can contain a
multitude of degenerate commensurate ground states. The relevant
phase diagrams for many combinations of the H and T systems are
mapped out as a function of adhesion strength and misfit strain.
The coarsening patterns in some of these systems is also examined.
The predictions are in good agreement with existing experimental
data for selected strained ultrathin adsorption layers.",
doi = "10.1103/PhysRevB.96.195439",
url = "http://dx.doi.org/10.1103/PhysRevB.96.195439",
issn = "1098-0121",
label = "lattes: 2370990773271434 3 ElderAchGraYinAla:2017:StHoTw",
language = "en",
targetfile = "elder_striped.pdf",
urlaccessdate = "02 maio 2024"
}