Abstract
Original language | Undefined |
---|---|
Pages (from-to) | 136103- |
Journal | Physical review letters |
Volume | 99 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- IR-59164
- METIS-242122
Cite this
}
Bistability in the shape transition of strained islands. / Zandvliet, Henricus J.W.; van Gastel, Raoul.
In: Physical review letters, Vol. 99, No. 13, 2007, p. 136103-.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Bistability in the shape transition of strained islands
AU - Zandvliet, Henricus J.W.
AU - van Gastel, Raoul
PY - 2007
Y1 - 2007
N2 - The equilibrium shape of a monatomic strained island on a substrate depends on the step free energies and the difference in surface stress between the island and the substrate. For small island sizes the step free energies dominate, resulting in compact islands. Beyond a critical island size, however, the strain energy becomes dominant and the island maximizes its perimeter, resulting in elongated islands. Here we show that for strained islands with force monopoles pointing in opposing directions at neighboring steps, a regime exists near the critical island size where both compact and elongated shapes can coexist.
AB - The equilibrium shape of a monatomic strained island on a substrate depends on the step free energies and the difference in surface stress between the island and the substrate. For small island sizes the step free energies dominate, resulting in compact islands. Beyond a critical island size, however, the strain energy becomes dominant and the island maximizes its perimeter, resulting in elongated islands. Here we show that for strained islands with force monopoles pointing in opposing directions at neighboring steps, a regime exists near the critical island size where both compact and elongated shapes can coexist.
KW - IR-59164
KW - METIS-242122
U2 - 10.1103/PhysRevLett.99.136103
DO - 10.1103/PhysRevLett.99.136103
M3 - Article
VL - 99
SP - 136103-
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 13
ER -